Gr 11 Physical Sciences: Term test 1
296 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

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. (D)</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. (D)</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. (D)</p> Signup and view all the answers

What does the resultant vector represent?

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

What does a closed vector diagram indicate?

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

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

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

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

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

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

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

What is the symbol often used to represent force?

<p>F (A)</p> Signup and view all the answers

What can forces do to objects?

<p>Change the shape of an object (A)</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 (B)</p> Signup and view all the answers

What is the resultant force?

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

What is the normal force?

<p>The force that balances the gravitational force (B)</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 (B)</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 (C)</p> Signup and view all the answers

What is the coefficient of friction?

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

What is the formula for the static frictional force?

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

What is the formula for the kinetic frictional force?

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

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

<p>F_net = ma (C)</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 (B)</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 (B)</p> Signup and view all the answers

What is the direction of the frictional force?

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

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

<p>It points upwards (D)</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 (C)</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) (D)</p> Signup and view all the answers

What is the unit of gravitational force?

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

What is the gravitational constant?

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

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

<p>F = mg (C)</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 (A)</p> Signup and view all the answers

Under what conditions can weightlessness occur?

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

What is the electrostatic constant in free space?

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

What is the formula for Coulomb's law?

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

What is the relationship between like charges?

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

Who studied the electrostatic force in detail around 1784?

<p>Charles-Augustin de Coulomb (C)</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 (A)</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 (C)</p> Signup and view all the answers

What do electric field lines represent?

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

What happens to the force vectors around a positive charge?

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

What happens to the force vectors around a negative charge?

<p>They point towards the charge (A)</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 (D)</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 (C)</p> Signup and view all the answers

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

<p>They point towards both charges (C)</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 (B)</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 (C)</p> Signup and view all the answers

What is the electric field strength defined as?

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

What is the unit of electric field strength?

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

What is the value of Coulomb's constant?

<p>9.0 × 10⁹ N·m²/C² (C)</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 (D)</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 (A)</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 (A)</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 (D)</p> Signup and view all the answers

What is the mathematical form of Coulomb's law?

<p>F = kQ1Q2/r^2 (A)</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 (D)</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 (D)</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 (D)</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 (B)</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 (A)</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 (C)</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 (D)</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 (C)</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 (C)</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 (C)</p> Signup and view all the answers

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

<p>A vector quantity (C)</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 (A)</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 (A)</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 (D)</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 (D)</p> Signup and view all the answers

What is the direction of the frictional force?

<p>Parallel to the surface (A)</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 (D)</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 (B)</p> Signup and view all the answers

What is the equation for the static frictional force?

<p>f_s = μ_s N (D)</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 (A)</p> Signup and view all the answers

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

<p>Newton (N) (A)</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 (C)</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 (A)</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 (B)</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. (C)</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) (D)</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 (C)</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 (A)</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 (A)</p> Signup and view all the answers

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

<p>Newton (C)</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 (B)</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 (A)</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 (A)</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 (B)</p> Signup and view all the answers

What is the unit of gravitational force?

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

Under what conditions can weightlessness occur?

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

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

<p>9.8 m/s^2 (D)</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 (C)</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 (D)</p> Signup and view all the answers

What do electric field lines represent?

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

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

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

What is the coefficient of friction?

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

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

<p>Parallel to the surface (B)</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 (A)</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 (B)</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 (C)</p> Signup and view all the answers

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

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

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

<p>F = ma (C)</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 (B)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify complex force problems (C)</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 (B)</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 (C)</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 (B)</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 (B)</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. (A)</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. (B)</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. (B)</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 (D)</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 (D)</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. (D)</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. (C)</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. (B)</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. (B)</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. (A)</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 (A)</p> Signup and view all the answers

What are the units of electric field strength?

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

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

<p>E = kQ/r² (A)</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 (C)</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 (D)</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 (A)</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. (A)</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. (C)</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. (C)</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. (A)</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. (D)</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. (D)</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. (B)</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. (D)</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. (C)</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. (A)</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 (A)</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) (C)</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 (A)</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. (C)</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 (A)</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. (C)</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 (D)</p> Signup and view all the answers

What is the coefficient of friction?

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

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

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

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

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

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

<p>Force (C)</p> Signup and view all the answers

What is the direction of the frictional force?

<p>Parallel to the surface (B)</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. (A)</p> Signup and view all the answers

What is the resultant force equal to?

<p>The sum of the individual forces (D)</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) (B)</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 (D)</p> Signup and view all the answers

What is the unit of electric field strength?

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

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

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

What is the definition of electric field strength?

<p>The force per unit charge at a point (C)</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 (D)</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 (B)</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 (D)</p> Signup and view all the answers

What is the unit of gravitational force?

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

Under what conditions can weightlessness occur?

<p>When the object is in free fall or orbit (D)</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 (B)</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) (A)</p> Signup and view all the answers

What is the formula for Coulomb's law?

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

What is the relationship between like charges?

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

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

<p>Vector resolution (D)</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 (C)</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 (B)</p> Signup and view all the answers

Who studied the electrostatic force in detail around 1784?

<p>Charles-Augustin de Coulomb (D)</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 (A)</p> Signup and view all the answers

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

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

What is the formula for the static frictional force?

<p>f_s = μ_s N (D)</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 (C)</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 (B)</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 (C)</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 (B)</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 (C)</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. (C)</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. (A)</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. (C)</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. (B)</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. (D)</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. (D)</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. (C)</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. (B)</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. (D)</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. (A)</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 (A)</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 (D)</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 (B)</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 (D)</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 (A)</p> Signup and view all the answers

What is the mathematical form of Coulomb's law?

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

What is the unit of the gravitational constant G?

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

Under what conditions can weightlessness occur?

<p>When an object is in free fall or orbit (D)</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 (B)</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 (C)</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 (C)</p> Signup and view all the answers

What is the electrostatic constant in free space?

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

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

<p>It decreases (C)</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 (A)</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 (A)</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 (A)</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 (D)</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. (B)</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 (A)</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 (A)</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. (A)</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. (C)</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 (B)</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 (A)</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) (D)</p> Signup and view all the answers

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

<p>Newton (D)</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 (B)</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. (C)</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 (D)</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 (D)</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 (A)</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 (B)</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. (C)</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 (B)</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 (D)</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 (C)</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 (A)</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 (C)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

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

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

<p>F = ma (A)</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 (B)</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 (C)</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. (A)</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. (C)</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 (B)</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 (D)</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. (B)</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. (C)</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. (A)</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 (D)</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. (D)</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. (B)</p> Signup and view all the answers

What is the unit of electric field strength?

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

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

<p>Away from the charge (B)</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 (C)</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 (B)</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 (B)</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 (A)</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 (B)</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 (C)</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 (D)</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 (C)</p> Signup and view all the answers

Flashcards are hidden until you start studying

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser