Gr 11 Physical Sciences: Term test 1
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Questions and Answers

What is the main difference between the x-axis and the y-axis in the Cartesian plane?

  • The x-axis is used for direction and the y-axis is used for magnitude.
  • The x-axis is vertical and the y-axis is horizontal.
  • The x-axis is used for magnitude and the y-axis is used for direction.
  • The x-axis is horizontal and the y-axis is vertical. (correct)

    • What is the property that allows vectors to be positioned anywhere on the Cartesian plane without changing their physical meaning?

  • Vector magnitude
  • Vector direction
  • Vector equality (correct)
  • Vector addition

    • What is the characteristic of vectors that are perpendicular?

  • They have the same magnitude but opposite directions.
  • They are parallel and never intersect.
  • They form a right angle when originating from the same point. (correct)
  • They are always horizontal and vertical.

    • How are angles typically measured in specifying vector directions?

    <p>Anti-clockwise from the positive x-axis.</p> Signup and view all the answers

    What is the purpose of specifying compass directions and bearings in vectors?

    <p>To describe vector directions in navigation and geography.</p> Signup and view all the answers

    What is the name of the method used to add vectors graphically in two dimensions?

    <p>Tail-to-head method.</p> Signup and view all the answers

    What does the resultant vector represent?

    <p>The combined effect of multiple vectors acting simultaneously.</p> Signup and view all the answers

    What is the benefit of using perpendicular vectors in vector addition?

    <p>They simplify calculations of resultant vectors.</p> Signup and view all the answers

    What is the method of adding vectors where the tail of the second vector is placed at the head of the first vector?

    <p>Head-to-Tail Method</p> Signup and view all the answers

    What does a closed vector diagram indicate?

    <p>The resultant vector is zero</p> Signup and view all the answers

    What formula is used to find the magnitude of the resultant vector when dealing with perpendicular vectors?

    <p>R = √(Rx^2 + Ry^2)</p> Signup and view all the answers

    What is the process of breaking a vector into its components called?

    <p>Resolving into Components</p> Signup and view all the answers

    What are the two components that a vector can be resolved into?

    <p>Horizontal and vertical</p> Signup and view all the answers

    What is the unit of force in the International System of Units (SI)?

    <p>Newton</p> Signup and view all the answers

    What is a force that does not have to touch an object to cause a change?

    <p>Non-Contact Force</p> Signup and view all the answers

    What is the symbol often used to represent force?

    <p>F</p> Signup and view all the answers

    What can forces do to objects?

    <p>Change the shape of an object</p> Signup and view all the answers

    What is the definition of a force?

    <p>A force is anything that can cause a change to objects</p> Signup and view all the answers

    What is the resultant force?

    <p>The vector sum of all forces acting on an object</p> Signup and view all the answers

    What is the normal force?

    <p>The force that balances the gravitational force</p> Signup and view all the answers

    What is the direction of the normal force exerted by a surface on an object resting on it?

    <p>Perpendicular to the surface</p> Signup and view all the answers

    What happens to the apparent weight of an object when it accelerates upwards in a lift?

    <p>It increases</p> Signup and view all the answers

    What is the coefficient of friction?

    <p>A constant for a given pair of surfaces</p> Signup and view all the answers

    What is the purpose of a force diagram?

    <p>To sketch all the forces acting on a system</p> Signup and view all the answers

    What is the definition of Newton's Third Law of Motion?

    <p>For every action, there is an equal and opposite reaction</p> Signup and view all the answers

    What is the process of resolving forces into components?

    <p>Breaking down a force into its x- and y-components</p> Signup and view all the answers

    What is the force that opposes the motion of an object in contact with a surface called?

    <p>Frictional force</p> Signup and view all the answers

    What is the formula for the static frictional force?

    <p>f_max,s = μ_s N</p> Signup and view all the answers

    What is the formula for the kinetic frictional force?

    <p>f_k = μ_k N</p> Signup and view all the answers

    What is the purpose of a free body diagram?

    <p>To represent the object of interest as a dot, with all forces acting on it drawn as arrows</p> Signup and view all the answers

    What is the definition of Newton's First Law of Motion?

    <p>An object continues in a state of rest or uniform motion unless acted on by an unbalanced force</p> Signup and view all the answers

    What is the mathematical representation of Newton's Second Law of Motion?

    <p>F_net = ma</p> Signup and view all the answers

    What is the direction of the component of the gravitational force parallel to the slope of an inclined plane?

    <p>Down the slope</p> Signup and view all the answers

    What is the relationship between the masses and the distance between them in Newton's Law of Universal Gravitation?

    <p>The force is proportional to the product of the masses and inversely proportional to the square of the distance between them</p> Signup and view all the answers

    What is the direction of the frictional force?

    <p>Parallel to the surface</p> Signup and view all the answers

    What happens to the net force when a lift accelerates upwards?

    <p>It points upwards</p> Signup and view all the answers

    What is the purpose of a free-body diagram?

    <p>To show all the forces acting on an object</p> Signup and view all the answers

    What is the equation for the gravitational force acting on an object on an inclined plane?

    <p>F_gx = F_g sin(θ)</p> Signup and view all the answers

    What is the unit of gravitational force?

    <p>newtons (N)</p> Signup and view all the answers

    What is the gravitational constant?

    <p>6.67 × 10⁻¹¹ N·m²·kg⁻²</p> Signup and view all the answers

    What is the formula to relate gravitational force to mass and gravitational acceleration?

    <p>F = mg</p> Signup and view all the answers

    What is the difference between mass and weight?

    <p>Mass is the amount of matter in an object, while weight is the force of gravity on an object</p> Signup and view all the answers

    Under what conditions can weightlessness occur?

    <p>When an object is in free fall or orbit</p> Signup and view all the answers

    What is the similarity between Coulomb's law and Newton's universal law of gravitation?

    <p>Both are inverse-square laws</p> Signup and view all the answers

    What is the electrostatic constant in free space?

    <p>9.0 × 10⁹ N·m²·C⁻²</p> Signup and view all the answers

    What is the formula for Coulomb's law?

    <p>F = k × Q₁ Q₂ / r²</p> Signup and view all the answers

    What is the relationship between like charges?

    <p>Like charges repel each other</p> Signup and view all the answers

    Who studied the electrostatic force in detail around 1784?

    <p>Charles-Augustin de Coulomb</p> Signup and view all the answers

    What is an electric field?

    <p>A region of space in which an electric charge will experience a force</p> Signup and view all the answers

    What is the direction of the electric field at a point in space?

    <p>The direction in which a positive test charge would move</p> Signup and view all the answers

    What do electric field lines represent?

    <p>The direction and relative strength of the electric field</p> Signup and view all the answers

    What happens to the force vectors around a positive charge?

    <p>They point away from the charge</p> Signup and view all the answers

    What happens to the force vectors around a negative charge?

    <p>They point towards the charge</p> Signup and view all the answers

    What is true about electric field lines around two unlike charges?

    <p>They start from the positive charge and end at the negative charge</p> Signup and view all the answers

    What happens to a positive test charge between two positive charges?

    <p>It is repelled by both charges</p> Signup and view all the answers

    What is true about electric field lines around two negative charges?

    <p>They point towards both charges</p> Signup and view all the answers

    What happens to electric field lines when the magnitudes of the charges are different?

    <p>They are more influenced by the charge with the greater magnitude</p> Signup and view all the answers

    What is the purpose of drawing electric field lines?

    <p>To show the direction and relative strength of the electric field</p> Signup and view all the answers

    What is the electric field strength defined as?

    <p>The force per unit charge at a point</p> Signup and view all the answers

    What is the unit of electric field strength?

    <p>Newtons per coulomb (N·C⁻¹)</p> Signup and view all the answers

    What is the formula for electric field strength in terms of force and charge?

    <p>E = F/q</p> Signup and view all the answers

    What is the formula for electric field strength in terms of the source charge and distance?

    <p>E = kQ/r²</p> Signup and view all the answers

    What is the value of Coulomb's constant?

    <p>9.0 × 10⁹ N·m²/C²</p> Signup and view all the answers

    What is the physical significance of the electric field strength?

    <p>It represents the force per unit charge at a point</p> Signup and view all the answers

    What is the relationship between the electrostatic force and the distance between the charges?

    <p>Inversely proportional to the square of the distance</p> Signup and view all the answers

    What is the value of the electrostatic constant in free space?

    <p>9.0 × 10^9 N·m^2/C^2</p> Signup and view all the answers

    What is the similarity between Coulomb's law and Newton's universal law of gravitation?

    <p>Both describe forces that are inversely proportional to the square of the distance between particles</p> Signup and view all the answers

    What is the mathematical form of Coulomb's law?

    <p>F = kQ1Q2/r^2</p> Signup and view all the answers

    What happens to the electrostatic force as the distance between charges doubles?

    <p>It decreases by a factor of four</p> Signup and view all the answers

    What is the purpose of the concept of electric field?

    <p>To explain how charges influence each other across space</p> Signup and view all the answers

    What is the relationship between the electrostatic force and the magnitude of the charges?

    <p>It is directly proportional to the magnitude of the charges</p> Signup and view all the answers

    What is the similarity between the electrostatic force and the gravitational force?

    <p>Both are inversely proportional to the square of the distance between particles</p> Signup and view all the answers

    What is the significance of the inverse-square law in physics?

    <p>It illustrates the importance of distance in the interaction between particles</p> Signup and view all the answers

    What is the main difference between Coulomb's law and Newton's universal law of gravitation?

    <p>Coulomb's law describes the electrostatic force, while Newton's law describes the gravitational force</p> Signup and view all the answers

    What is the significance of the Cartesian plane in representing vectors in two dimensions?

    <p>It allows vectors to be positioned anywhere on the plane without changing their physical meaning</p> Signup and view all the answers

    What is the characteristic of vectors that are added using the tail-to-head method?

    <p>They are perpendicular to each other</p> Signup and view all the answers

    What is the purpose of specifying vector directions using angles measured anti-clockwise from the positive x-axis?

    <p>To determine the direction of the vector</p> Signup and view all the answers

    What is the advantage of using bearings to specify vector directions?

    <p>It provides a numerical way to specify directions</p> Signup and view all the answers

    What is the result of adding two or more vectors in two dimensions?

    <p>A vector quantity</p> Signup and view all the answers

    What is the significance of perpendicular vectors in understanding vector addition?

    <p>They simplify the calculation of the resultant vector</p> Signup and view all the answers

    What is the purpose of specifying compass directions in vectors?

    <p>To describe vector directions in navigation and geography</p> Signup and view all the answers

    What is the benefit of using the tail-to-head method to add vectors?

    <p>It simplifies the calculation of the resultant vector when dealing with perpendicular vectors</p> Signup and view all the answers

    What happens to the apparent weight of an object when it accelerates downwards in a lift?

    <p>It decreases</p> Signup and view all the answers

    What is the direction of the frictional force?

    <p>Parallel to the surface</p> Signup and view all the answers

    What is the name of the force that arises between objects due to their mass and is always attractive?

    <p>Gravitational force</p> Signup and view all the answers

    What is the purpose of a free body diagram?

    <p>To include all forces acting on the object</p> Signup and view all the answers

    What is the equation for the static frictional force?

    <p>f_s = μ_s N</p> Signup and view all the answers

    What is the direction of the component of the gravitational force parallel to the slope of an inclined plane?

    <p>Parallel to the slope</p> Signup and view all the answers

    What is the unit of force in the International System of Units (SI)?

    <p>Newton (N)</p> Signup and view all the answers

    What is the definition of Newton's Third Law of Motion?

    <p>For every action, there is an equal and opposite reaction</p> Signup and view all the answers

    What is the purpose of resolving forces into components?

    <p>To understand the motion of an object on an inclined plane</p> Signup and view all the answers

    What is the relationship between the masses and the distance between them in Newton's Law of Universal Gravitation?

    <p>The force is directly proportional to the product of the masses and inversely proportional to the distance between them</p> Signup and view all the answers

    What is the significance of a closed vector diagram?

    <p>It indicates that the resultant vector has zero magnitude.</p> Signup and view all the answers

    How can the magnitude of the resultant vector be found when dealing with perpendicular vectors?

    <p>Using the formula R = √(Rx^2 + Ry^2)</p> Signup and view all the answers

    What is the purpose of resolving a vector into its components?

    <p>To simplify vector addition and subtraction</p> Signup and view all the answers

    What is the characteristic of a force that can cause a change to objects?

    <p>It is a vector quantity</p> Signup and view all the answers

    What is the difference between a contact force and a non-contact force?

    <p>A contact force must touch an object to cause a change, while a non-contact force does not</p> Signup and view all the answers

    What is the unit of force in the International System of Units (SI)?

    <p>Newton</p> Signup and view all the answers

    What is the purpose of using trigonometric identities in resolving vectors into components?

    <p>To determine the horizontal and vertical components of the vector</p> Signup and view all the answers

    What is the result of adding vectors graphically using the head-to-tail method?

    <p>The resultant vector is the sum of the individual vectors</p> Signup and view all the answers

    What is the significance of the angle θ in resolving vectors into components?

    <p>It is the angle between the vector and the x-axis</p> Signup and view all the answers

    What is the benefit of using the tail-to-tail method for adding vectors?

    <p>It simplifies the addition of multiple vectors</p> Signup and view all the answers

    What is the unit of gravitational force?

    <p>newtons (N)</p> Signup and view all the answers

    What is the relationship between the gravitational force and the distance between the centers of the two masses?

    <p>inversely proportional</p> Signup and view all the answers

    What is the difference between mass and weight?

    <p>Mass is a scalar quantity, while weight is a vector quantity</p> Signup and view all the answers

    Under what conditions can weightlessness occur?

    <p>when there is no normal force acting on an object</p> Signup and view all the answers

    What is the similarity between Coulomb's law and Newton's universal law of gravitation?

    <p>both are inverse-square laws</p> Signup and view all the answers

    What is the formula for the electrostatic force between two point-like charges?

    <p>F = k Q_1 Q_2 / r^2</p> Signup and view all the answers

    What is the purpose of using comparative problems in physics?

    <p>to calculate a quantity in terms of another known quantity</p> Signup and view all the answers

    What is the direction of the gravitational force between two objects?

    <p>along the line connecting the centers of the two objects</p> Signup and view all the answers

    What is the gravitational acceleration near the surface of the Earth?

    <p>9.8 m/s^2</p> Signup and view all the answers

    What is the electrostatic constant in free space?

    <p>9.0 x 10^9 N·m^2·C^-2</p> Signup and view all the answers

    What is the direction of the electric field at a point in space?

    <p>The direction of the force that a positive test charge would experience</p> Signup and view all the answers

    What do electric field lines represent?

    <p>The direction of the force experienced by a test charge</p> Signup and view all the answers

    What is the purpose of finding the resultant force in physics?

    <p>To determine the effect of all the forces acting on an object</p> Signup and view all the answers

    What happens to the force between two charges as the distance between them increases?

    <p>It decreases</p> Signup and view all the answers

    What is the coefficient of friction?

    <p>A constant that depends on the surfaces in contact</p> Signup and view all the answers

    What is the direction of the electric field lines around a positive charge?

    <p>Away from the charge</p> Signup and view all the answers

    What is the purpose of drawing a free-body diagram?

    <p>To represent all the forces acting on an object as arrows</p> Signup and view all the answers

    What is the effect of the magnitude of the charge on the electric field?

    <p>A larger charge results in a stronger electric field</p> Signup and view all the answers

    What is the direction of the frictional force acting on an object?

    <p>Parallel to the surface</p> Signup and view all the answers

    What is the characteristic of the electric field lines around two like charges?

    <p>They repel from both charges</p> Signup and view all the answers

    What is the normal force acting on an object?

    <p>A force that is perpendicular to the surface</p> Signup and view all the answers

    What happens to the electric field lines when the magnitudes of the charges are different?

    <p>The field lines are more influenced by the charge with the greater magnitude</p> Signup and view all the answers

    What is the direction of the electric field lines around a negative charge?

    <p>Towards the charge</p> Signup and view all the answers

    What is the mathematical representation of Newton's Second Law of Motion?

    <p>F = ma</p> Signup and view all the answers

    What is the purpose of drawing electric field lines?

    <p>To show the direction of the force experienced by a test charge</p> Signup and view all the answers

    What is the purpose of resolving forces into components?

    <p>To simplify complex force problems</p> Signup and view all the answers

    What is the characteristic of the electric field lines around two unlike charges?

    <p>They start from the positive charge and end at the negative charge</p> Signup and view all the answers

    What is the direction of the component of the gravitational force parallel to the slope of an inclined plane?

    <p>Parallel to the slope</p> Signup and view all the answers

    What is the definition of Newton's First Law of Motion?

    <p>An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted on by an external force</p> Signup and view all the answers

    What is the significance of the resultant force in physics?

    <p>It determines the acceleration of an object</p> Signup and view all the answers

    What is the relationship between the magnitude of the charges and the electrostatic force between them?

    <p>The electrostatic force is directly proportional to the magnitude of the charges.</p> Signup and view all the answers

    What is the significance of the inverse-square relationship in Coulomb's law and Newton's law of gravitation?

    <p>It shows that the force decreases with the distance between the particles.</p> Signup and view all the answers

    What is the purpose of the concept of an electric field?

    <p>To explain how charges influence each other across space.</p> Signup and view all the answers

    What is the value of the electrostatic constant in free space?

    <p>9.0 × 10^9 N·m^2/C^2</p> Signup and view all the answers

    What is the mathematical formula for Coulomb's law?

    <p>F = k Q_1 Q_2 / r^2</p> Signup and view all the answers

    What is the effect of doubling the distance between two charges on the electrostatic force between them?

    <p>The force decreases by a factor of four.</p> Signup and view all the answers

    What is the similarity between Coulomb's law and Newton's law of gravitation?

    <p>Both describe forces that are inversely proportional to the distance between particles.</p> Signup and view all the answers

    What is the direction of the electrostatic force between two point charges?

    <p>Parallel to the line joining the charges.</p> Signup and view all the answers

    What is the significance of the gravitational constant in Newton's law of gravitation?

    <p>It is a fundamental constant of nature.</p> Signup and view all the answers

    What is the relationship between the electrostatic force and the distance between two charges?

    <p>The electrostatic force is inversely proportional to the distance between the charges.</p> Signup and view all the answers

    What is the electric field strength at a point defined as?

    <p>The force per unit charge at that point</p> Signup and view all the answers

    What are the units of electric field strength?

    <p>Newtons per coulomb</p> Signup and view all the answers

    What is the formula for electric field strength using Coulomb's law?

    <p>E = kQ/r²</p> Signup and view all the answers

    What is the purpose of introducing a test charge in the concept of electric field strength?

    <p>To quantify the electric field strength at a point</p> Signup and view all the answers

    What is the relationship between the electric field strength and the distance from the source charge?

    <p>The electric field strength is inversely proportional to the square of the distance</p> Signup and view all the answers

    What is the value of Coulomb's constant in free space?

    <p>9.0 × 10⁹ N·m²/C²</p> Signup and view all the answers

    What is the significance of vectors being perpendicular in vector addition?

    <p>It simplifies calculations of resultant vectors.</p> Signup and view all the answers

    What is the purpose of specifying vector directions using angles measured anti-clockwise from the positive x-axis?

    <p>To specify the direction of the vector accurately.</p> Signup and view all the answers

    What is the benefit of using compass directions and bearings in specifying vector directions?

    <p>It provides a numerical way to specify directions.</p> Signup and view all the answers

    What is true about the resultant vector when adding vectors in two dimensions?

    <p>It represents the combined effect of multiple vectors acting simultaneously.</p> Signup and view all the answers

    What is the characteristic of vectors that allows them to be positioned anywhere on the Cartesian plane?

    <p>Vector equality.</p> Signup and view all the answers

    What is the purpose of vector addition in two dimensions?

    <p>To find the combined effect of multiple vectors acting simultaneously.</p> Signup and view all the answers

    What is the significance of preserving the magnitude and direction of a vector when positioning it on the Cartesian plane?

    <p>It does not change the physical meaning of the vector.</p> Signup and view all the answers

    What is the advantage of using the graphical method to add vectors in two dimensions?

    <p>It provides a visual representation of the vector addition process.</p> Signup and view all the answers

    What is the primary advantage of using the tail-to-head method for vector addition?

    <p>It allows for the addition of more than two vectors.</p> Signup and view all the answers

    When resolving a vector into components, what is the most useful orientation for the components?

    <p>Parallel to the x- and y-axes.</p> Signup and view all the answers

    What is the main purpose of drawing a free-body diagram?

    <p>To identify the forces acting on an object</p> Signup and view all the answers

    What is the trigonometric identity used to find the vertical component of a vector?

    <p>R_y = R sin(θ)</p> Signup and view all the answers

    When is the static frictional force equal to the maximum value?

    <p>When the object is not moving</p> Signup and view all the answers

    What is the purpose of finding the components of a vector?

    <p>To break a vector into more manageable parts for analysis.</p> Signup and view all the answers

    What is the direction of the normal force exerted by a surface on an object?

    <p>Perpendicular to the surface</p> Signup and view all the answers

    What is the result of adding vectors that form a closed polygon?

    <p>A resultant vector with a magnitude of zero.</p> Signup and view all the answers

    What is the effect of the resultant force on an object?

    <p>It causes the object to accelerate in the direction of the force</p> Signup and view all the answers

    What is the coefficient of friction?

    <p>A constant that depends on the surfaces in contact</p> Signup and view all the answers

    What is the characteristic of forces that allows them to be classified as either contact or non-contact?

    <p>Their requirement to touch or be in contact with an object.</p> Signup and view all the answers

    What is the unit of force in the International System of Units (SI)?

    <p>Newton (N)</p> Signup and view all the answers

    What is the purpose of resolving forces into components?

    <p>To simplify the calculation of the resultant force</p> Signup and view all the answers

    What is the mathematical representation of Newton's Second Law of Motion?

    <p>F = ma</p> Signup and view all the answers

    What is the vector quantity that has both magnitude and direction?

    <p>Force</p> Signup and view all the answers

    What is the direction of the frictional force?

    <p>Parallel to the surface</p> Signup and view all the answers

    What is the purpose of resolving forces into components?

    <p>To break a force into more manageable parts for analysis.</p> Signup and view all the answers

    What is the resultant force equal to?

    <p>The sum of the individual forces</p> Signup and view all the answers

    What is the trigonometric identity used to find the horizontal component of a vector?

    <p>R_x = R cos(θ)</p> Signup and view all the answers

    What is the purpose of using a force diagram?

    <p>To identify the forces acting on an object</p> Signup and view all the answers

    What is the unit of electric field strength?

    <p>Newtons per coulomb (N·C⁻¹)</p> Signup and view all the answers

    What is the formula for electric field strength using Coulomb's law?

    <p>E = kQ / r²</p> Signup and view all the answers

    What is the definition of electric field strength?

    <p>The force per unit charge at a point</p> Signup and view all the answers

    What is the physical meaning of electric field strength?

    <p>It represents the force experienced by a test charge</p> Signup and view all the answers

    What is the relationship between electric field strength and distance from the source charge?

    <p>It decreases with distance</p> Signup and view all the answers

    What is the constant of proportionality in Coulomb's law?

    <p>9.0 x 10⁹ N·m²/C²</p> Signup and view all the answers

    What is the unit of gravitational force?

    <p>Newtons (N)</p> Signup and view all the answers

    What is the formula for the gravitational force acting on an object on an inclined plane?

    <p>F = mg</p> Signup and view all the answers

    Under what conditions can weightlessness occur?

    <p>When the object is in free fall or orbit</p> Signup and view all the answers

    What is the similarity between Coulomb's law and Newton's universal law of gravitation?

    <p>Both are inverse-square laws</p> Signup and view all the answers

    What is the electrostatic constant in free space?

    <p>9.0 × 10^9 N·m^2·C^(-2)</p> Signup and view all the answers

    What is the formula for Coulomb's law?

    <p>F = kQ1Q2 / r^2</p> Signup and view all the answers

    What is the relationship between like charges?

    <p>They repel each other</p> Signup and view all the answers

    What is the reason for the acceleration of an object on an inclined plane?

    <p>The component of the gravitational force parallel to the slope is greater than the normal force</p> Signup and view all the answers

    What is the process of breaking a vector into its components called?

    <p>Vector resolution</p> Signup and view all the answers

    What is the difference between mass and weight?

    <p>Mass is the amount of matter in an object, while weight is the force of gravity on an object</p> Signup and view all the answers

    What is the effect of the acceleration of a lift on the apparent weight of an object?

    <p>The apparent weight increases</p> Signup and view all the answers

    Who studied the electrostatic force in detail around 1784?

    <p>Charles-Augustin de Coulomb</p> Signup and view all the answers

    What is the condition for an object to be in equilibrium?

    <p>The sum of the forces acting on it is equal to zero</p> Signup and view all the answers

    What is the direction of the frictional force acting on an object?

    <p>Parallel to the surface</p> Signup and view all the answers

    What is the formula for the static frictional force?

    <p>f_s = μ_s N</p> Signup and view all the answers

    What is the purpose of resolving forces into components?

    <p>To simplify the analysis of forces in two-dimensional problems</p> Signup and view all the answers

    What is the definition of Newton's Law of Universal Gravitation?

    <p>Every point mass attracts every other point mass by a force directed along the line connecting the two</p> Signup and view all the answers

    What is the effect of the acceleration of a lift on the net force acting on it?

    <p>The net force increases</p> Signup and view all the answers

    What is the purpose of a free body diagram?

    <p>To include all forces acting on the object, including gravitational, normal, frictional, and applied forces</p> Signup and view all the answers

    What is the direction of the normal force exerted by a surface on an object resting on it?

    <p>Perpendicular to the surface</p> Signup and view all the answers

    What is the definition of an electric field?

    <p>A region of space where an electric charge experiences a force.</p> Signup and view all the answers

    What is the direction of the electric field at a point in space?

    <p>The direction of the force that a positive test charge would experience if placed at that point.</p> Signup and view all the answers

    How do electric field lines represent the strength of an electric field?

    <p>The strength of the electric field is represented by the number of electric field lines.</p> Signup and view all the answers

    What is the direction of the electric field around a positive charge?

    <p>The electric field lines point away from the positive charge.</p> Signup and view all the answers

    What happens to the electric field lines around two like charges?

    <p>The electric field lines repel from both charges, resulting in a region of no net force.</p> Signup and view all the answers

    What is the effect of the magnitude of the charge on the electric field?

    <p>The greater the magnitude of the charge, the stronger the electric field.</p> Signup and view all the answers

    What is the relationship between the electric field lines and the force experienced by a test charge?

    <p>The electric field lines indicate the direction of the force experienced by a positive test charge.</p> Signup and view all the answers

    What is the purpose of drawing electric field lines?

    <p>To represent the direction of the electric field.</p> Signup and view all the answers

    What is the relationship between the electric field lines around two unlike charges?

    <p>The electric field lines start from the positive charge and end at the negative charge.</p> Signup and view all the answers

    What is the effect of the distance on the electric field?

    <p>The electric field decreases with distance from the charge.</p> Signup and view all the answers

    What is the relationship between the magnitude of the charges and the electrostatic force?

    <p>The electrostatic force is directly proportional to the product of the magnitudes of the charges</p> Signup and view all the answers

    What is the value of the electrostatic constant in free space?

    <p>9.0 × 10^9 N·m^2/C^2</p> Signup and view all the answers

    What is the similarity between Coulomb's law and Newton's universal law of gravitation?

    <p>Both laws describe forces that are inversely proportional to the square of the distance between the particles</p> Signup and view all the answers

    What is the effect of doubling the distance between two charges on the electrostatic force?

    <p>The electrostatic force decreases by a factor of four</p> Signup and view all the answers

    What is the purpose of the concept of an electric field?

    <p>To explain how charges influence each other across space</p> Signup and view all the answers

    What is the mathematical form of Coulomb's law?

    <p>F = k(Q1 × Q2)/r^2</p> Signup and view all the answers

    What is the relationship between the distance between two charges and the electrostatic force?

    <p>The electrostatic force is inversely proportional to the square of the distance between the charges</p> Signup and view all the answers

    What is the significance of the inverse-square relationship in Coulomb's law and Newton's law of gravitation?

    <p>It highlights the rapid decrease in force with increasing separation</p> Signup and view all the answers

    What is the importance of the electrostatic constant in Coulomb's law?

    <p>It is a fundamental constant that relates the electrostatic force to the charges and distance</p> Signup and view all the answers

    What is the characteristic of the electrostatic force described by Coulomb's law?

    <p>It is a long-range force</p> Signup and view all the answers

    What is the primary advantage of using perpendicular vectors in vector addition?

    <p>They simplify calculations of resultant vectors.</p> Signup and view all the answers

    A vector is described as 3 meters, 30 degrees north of east. What is the direction of this vector in degrees?

    <p>120 degrees</p> Signup and view all the answers

    What is the result of adding two vectors with the same magnitude but opposite directions?

    <p>A vector with zero magnitude.</p> Signup and view all the answers

    What is the purpose of specifying compass directions and bearings in vectors?

    <p>To describe the direction of a vector in a numerical way.</p> Signup and view all the answers

    A vector is represented on the Cartesian plane. What is the significance of the x-axis and y-axis?

    <p>The x-axis represents the horizontal direction and the y-axis represents the vertical direction.</p> Signup and view all the answers

    What is the primary characteristic of a resultant vector?

    <p>It represents the combined effect of multiple vectors acting simultaneously.</p> Signup and view all the answers

    What is the significance of vector equality in the Cartesian plane?

    <p>It states that a vector can be positioned anywhere on the Cartesian plane without changing its physical meaning as long as its magnitude and direction are preserved.</p> Signup and view all the answers

    What is the significance of specifying vector directions using angles measured anti-clockwise from the positive x-axis?

    <p>It allows for the description of vector directions in a numerical way.</p> Signup and view all the answers

    What is the main difference between the gravitational force and the electrostatic force?

    <p>One is attractive while the other is repulsive</p> Signup and view all the answers

    What is the relationship between the magnitude of the charges and the electrostatic force between them?

    <p>The electrostatic force is directly proportional to the product of the charges</p> Signup and view all the answers

    What is the purpose of a free-body diagram in the context of gravitational forces?

    <p>To analyze the gravitational interactions between multiple objects</p> Signup and view all the answers

    What is the unit of the gravitational constant G?

    <p>N·m²·kg⁻²</p> Signup and view all the answers

    What is the difference between the gravitational force and the weight of an object?

    <p>The gravitational force is the force acting on an object due to gravity, while the weight is the force acting on an object due to the normal force</p> Signup and view all the answers

    Under what conditions can weightlessness occur?

    <p>When an object is in free fall or orbit</p> Signup and view all the answers

    What is the similarity between Coulomb's law and Newton's universal law of gravitation?

    <p>Both are inverse-square laws</p> Signup and view all the answers

    What is the relationship between the mass and the weight of an object?

    <p>The mass of an object is directly proportional to its weight</p> Signup and view all the answers

    What is the purpose of a comparative problem in the context of gravitational forces?

    <p>To relate a quantity in terms of another known quantity</p> Signup and view all the answers

    What is the electrostatic constant in free space?

    <p>9.0 × 10⁹ N·m²·C⁻²</p> Signup and view all the answers

    What happens to the normal force when a lift accelerates downwards?

    <p>It decreases</p> Signup and view all the answers

    What is the direction of the resultant force when a force is applied to an object on an inclined plane?

    <p>Parallel to the slope</p> Signup and view all the answers

    What is the condition for an object to be in equilibrium?

    <p>The sum of the forces acting on it is equal to zero</p> Signup and view all the answers

    What is the relationship between the static frictional force and the normal force?

    <p>The static frictional force is proportional to the normal force</p> Signup and view all the answers

    What is the purpose of resolving forces into components?

    <p>To simplify the calculation of forces on an inclined plane</p> Signup and view all the answers

    What is the condition for the resultant vector to have a zero magnitude?

    <p>When the vectors are added in a closed diagram and the resultant vector ends at the origin.</p> Signup and view all the answers

    What is the formula for the gravitational force between two objects?

    <p>F_g = G * (m1 * m2) / r^2</p> Signup and view all the answers

    What is the difference between static friction and kinetic friction?

    <p>Static friction occurs on stationary objects, while kinetic friction occurs on moving objects</p> Signup and view all the answers

    What is the advantage of using perpendicular vectors in vector addition?

    <p>It makes the calculation of the resultant vector simpler.</p> Signup and view all the answers

    What is the purpose of resolving a vector into its components?

    <p>To simplify the calculation of the resultant vector.</p> Signup and view all the answers

    What is the purpose of a free-body diagram?

    <p>To show the forces acting on an object</p> Signup and view all the answers

    What is the direction of the frictional force acting on an object on a surface?

    <p>Parallel to the surface</p> Signup and view all the answers

    What is the formula to find the magnitude of the resultant vector when dealing with perpendicular vectors?

    <p>R = √(Rx^2 + Ry^2)</p> Signup and view all the answers

    What is the unit of force in the International System of Units (SI)?

    <p>Newton</p> Signup and view all the answers

    What is the relationship between the apparent weight and the acceleration of an object?

    <p>The apparent weight increases with acceleration</p> Signup and view all the answers

    What is the characteristic of a force that can cause a change to an object?

    <p>It can be either a contact or non-contact force.</p> Signup and view all the answers

    What is the process of finding the horizontal and vertical components of a vector?

    <p>Resolving into components</p> Signup and view all the answers

    What is the trigonometric identity used to find the horizontal component of a vector?

    <p>cos(θ) = Rx/R</p> Signup and view all the answers

    What is the method of adding vectors where the tail of the second vector is placed at the head of the first vector?

    <p>Tail-to-head method</p> Signup and view all the answers

    What is the graphical method of adding vectors where both vectors originate from the same point?

    <p>Tail-to-tail method</p> Signup and view all the answers

    What is the main difference between the static and kinetic frictional forces?

    <p>Static frictional force is present when an object is not moving and kinetic frictional force is present when an object is moving.</p> Signup and view all the answers

    What is the direction of the frictional force acting on an object in contact with a surface?

    <p>Parallel to the surface</p> Signup and view all the answers

    What is the coefficient of friction dependent on?

    <p>The nature of the surfaces in contact and the magnitude of the normal force</p> Signup and view all the answers

    What is the purpose of drawing a free-body diagram?

    <p>To identify the forces acting on an object and their directions</p> Signup and view all the answers

    What is the resultant force responsible for?

    <p>Causing an object to accelerate in the direction of the resultant force</p> Signup and view all the answers

    What is the relationship between the normal force and the gravitational force?

    <p>The normal force balances the gravitational force</p> Signup and view all the answers

    What is the purpose of resolving forces into components?

    <p>To simplify calculations involving inclined planes</p> Signup and view all the answers

    What is the mathematical representation of Newton's Second Law of Motion?

    <p>F = ma</p> Signup and view all the answers

    What is the direction of the component of the gravitational force perpendicular to the slope of an inclined plane?

    <p>Perpendicular to the slope</p> Signup and view all the answers

    What is the result of applying Newton's First Law of Motion to an object?

    <p>The object will continue in its state of motion unless acted on by an unbalanced force</p> Signup and view all the answers

    What is the primary difference between the electrostatic force and the gravitational force described by Newton's universal law of gravitation?

    <p>The electrostatic force is proportional to the product of the charges, while the gravitational force is proportional to the product of the masses.</p> Signup and view all the answers

    What is the significance of the inverse-square relationship in both Coulomb's law and Newton's universal law of gravitation?

    <p>It illustrates the rapid decrease in force with increasing separation between the interacting particles.</p> Signup and view all the answers

    What is the mathematical representation of the electrostatic force between two point charges?

    <p>F = k * Q1 * Q2 / r^2</p> Signup and view all the answers

    What is the value of the electrostatic constant in free space?

    <p>9.0 * 10^9 Nm^2/C^2</p> Signup and view all the answers

    What is the significance of the concept of an electric field?

    <p>It helps explain how charges influence each other across space.</p> Signup and view all the answers

    What is the primary difference between like charges and unlike charges?

    <p>Like charges repel each other, while unlike charges attract each other.</p> Signup and view all the answers

    What is the relationship between the electrostatic force and the distance between the charges?

    <p>The electrostatic force decreases with the square of the distance between the charges.</p> Signup and view all the answers

    What is the mathematical representation of the gravitational force between two masses?

    <p>F_G = G * m1 * m2 / d^2</p> Signup and view all the answers

    What is the significance of the comparison between Coulomb's law and Newton's universal law of gravitation?

    <p>It illustrates the mathematical similarity between the two laws.</p> Signup and view all the answers

    What is the primary characteristic of the electrostatic force described by Coulomb's law?

    <p>It is proportional to the product of the charges and inversely proportional to the square of the distance between them.</p> Signup and view all the answers

    What is the unit of electric field strength?

    <p>Newtons per coulomb (N·C⁻¹)</p> Signup and view all the answers

    What is the formula for electric field strength if the force experienced by a test charge is known?

    <p>E = F / q</p> Signup and view all the answers

    What is the physical quantity that is being measured when determining the electric field strength at a point?

    <p>Force per unit charge</p> Signup and view all the answers

    What is the relationship between the electric field strength and the distance from the source charge?

    <p>The electric field strength decreases with increasing distance from the source charge</p> Signup and view all the answers

    What is the value of Coulomb's constant in free space?

    <p>9.0 × 10⁹ N·m²/C²</p> Signup and view all the answers

    What is the physical significance of the electric field strength at a point?

    <p>It represents the force experienced by a test charge at that point</p> Signup and view all the answers

    What is the primary purpose of drawing electric field lines?

    <p>To represent the force experienced by a test charge at various points</p> Signup and view all the answers

    What is the direction of the electric field around a positive charge?

    <p>Away from the charge</p> Signup and view all the answers

    What happens to the electric field lines when the magnitude of the charge is increased?

    <p>More field lines are added around the charge</p> Signup and view all the answers

    What is the direction of the electric field around two unlike charges?

    <p>The field lines start from the positive charge and end at the negative charge</p> Signup and view all the answers

    What is the region around a charge where the electric field is zero?

    <p>The region where the electric field lines cancel out</p> Signup and view all the answers

    What is the direction of the electric field around two like charges of equal magnitude?

    <p>The field lines point away from both charges</p> Signup and view all the answers

    What is the difference between the electric field around a positive charge and a negative charge?

    <p>The direction of the electric field is opposite</p> Signup and view all the answers

    What is the purpose of drawing electric field lines perpendicular to a charge or charged surface?

    <p>To indicate the direction of the electric field</p> Signup and view all the answers

    What is the relationship between the magnitude of the charge and the strength of the electric field?

    <p>The strength of the electric field increases with an increase in the magnitude of the charge</p> Signup and view all the answers

    What is the significance of drawing electric field lines closer together in certain regions?

    <p>It indicates a region of stronger electric field</p> Signup and view all the answers

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