Understanding Applied Forces
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Questions and Answers

What is a force, according to the lesson?

  • A push or a pull exerted on an object (correct)
  • A type of motion
  • A type of energy
  • A type of friction

    • What is the net force if the forces acting on an object are balanced?

  • Zero (correct)
  • Less than zero
  • Greater than zero
  • Infinite

    • What is the effect of a force on an object?

  • It makes the object heavier.
  • It changes the color of the object.
  • It changes the shape of the object.
  • It creates a pushing or pulling effect on the object. (correct)

    • What is the type of force that occurs when objects are in physical contact?

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

    What happens to an object's state of motion when the net force is not zero?

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

    What is the term for the force that is exerted by one object on one or more other objects?

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

    What is the purpose of a free-body diagram?

    <p>To visually represent forces with vector arrows</p> Signup and view all the answers

    What is the direction of the force of gravity?

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

    What is an example of balanced forces?

    <p>An object moving at constant velocity</p> Signup and view all the answers

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

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

    What is the effect of unbalanced forces on an object?

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

    What is true about the net force of balanced forces?

    <p>It is zero</p> Signup and view all the answers

    What type of force is frictional force?

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

    What is the characteristic of forces that are additive?

    <p>They have both magnitude and direction</p> Signup and view all the answers

    What is an example of unbalanced forces?

    <p>A shopping cart slowing down</p> Signup and view all the answers

    What is the type of force that exists between objects that are not in physical contact?

    <p>Non-contact force</p> Signup and view all the answers

    What is a characteristic of a force?

    <p>It has both magnitude and direction</p> Signup and view all the answers

    What is Newton's first law of motion?

    <p>An object at rest stays at rest or an object in motion continues to move at a constant speed in a straight line unless acted upon by an unbalanced force</p> Signup and view all the answers

    What is the purpose of understanding the different types of forces?

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

    What is the term for the resulting force when two or more forces act on an object?

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

    What is the net force of unbalanced forces acting in the same direction?

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

    What is inertia defined as?

    <p>The tendency to resist a change in motion</p> Signup and view all the answers

    What is the formula for force according to Newton's second law of motion?

    <p>Force = Mass * Acceleration</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 a free-body diagram?

    <p>To analyze the magnitude and direction of forces acting on an object</p> Signup and view all the answers

    What is the difference between mass and weight?

    <p>Mass is the amount of matter, while weight is the force due to gravity</p> Signup and view all the answers

    How are the forces described in Newton's third law of motion?

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

    What is the purpose of a balance in measuring mass?

    <p>To measure the mass of an object</p> Signup and view all the answers

    What determines the amount of force required to change an object's acceleration?

    <p>The object's mass</p> Signup and view all the answers

    What is the definition of an unbalanced force?

    <p>A force that changes the state of motion</p> Signup and view all the answers

    What is the relationship between mass and acceleration?

    <p>Mass and acceleration are inversely proportional.</p> Signup and view all the answers

    Why does an unlucky bug splatter on your windshield when it hits it?

    <p>The bug has greater acceleration than the vehicle.</p> Signup and view all the answers

    What is momentum?

    <p>The product of mass and velocity.</p> Signup and view all the answers

    What is impulse in terms of force applied on an object?

    <p>The change in momentum.</p> Signup and view all the answers

    Which factor can vary to ensure a safer landing using the impulse-momentum theorem?

    <p>Time interval of the force application</p> Signup and view all the answers

    What does the weight of an object depend on?

    <p>The object's mass and the gravitational force</p> Signup and view all the answers

    Why does an object's weight differ on the moon compared to Earth?

    <p>The moon's gravity is weaker than Earth's</p> Signup and view all the answers

    What is mass a measure of?

    <p>The amount of matter in an object</p> Signup and view all the answers

    How can weight be calculated?

    <p>Mass multiplied by gravitational force</p> Signup and view all the answers

    Which quantity remains constant regardless of an object's location?

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

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

    <p>It can change the object's state of rest or motion, direction of motion, or shape and size.</p> Signup and view all the answers

    What are frictional force, air resistance, tension force, and spring force examples of?

    <p>Contact forces.</p> Signup and view all the answers

    What is a characteristic of forces that are additive?

    <p>The resultant force is the vector sum of each force.</p> Signup and view all the answers

    What is the difference between contact and non-contact forces?

    <p>Contact forces involve physical contact.</p> Signup and view all the answers

    What is the purpose of identifying the forces acting on an object?

    <p>To understand how the forces affect the object.</p> Signup and view all the answers

    What is the type of force that exists between objects that are in physical contact?

    <p>Contact 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.</p> Signup and view all the answers

    What is the term for the force that is exerted by one object on one or more other objects?

    <p>Applied force.</p> Signup and view all the answers

    What is the characteristic of forces that are vector quantities?

    <p>They have both magnitude and direction.</p> Signup and view all the answers

    What type of force is gravitational force?

    <p>Non-contact force.</p> Signup and view all the answers

    What is the purpose of illustrating vector forces along with the object of interest?

    <p>To provide a good visual representation of individual forces</p> Signup and view all the answers

    What is the result of an object experiencing a net force of zero?

    <p>The object remains stationary or moves at a constant velocity</p> Signup and view all the answers

    What is the advantage of using free-body diagrams?

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

    What is the characteristic of balanced forces?

    <p>They are equal in magnitude but opposite in direction</p> Signup and view all the answers

    What is the effect of unbalanced forces on an object's state of motion?

    <p>It changes its state of motion</p> Signup and view all the answers

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

    <p>To provide as much information as possible about each force</p> Signup and view all the answers

    What is the result of forces acting on an object in opposite directions?

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

    What is the characteristic of an object acted upon by balanced forces?

    <p>It remains stationary or moves at a constant velocity</p> Signup and view all the answers

    What is the purpose of calculating the net force?

    <p>To determine the resulting motion of an object</p> Signup and view all the answers

    What is the relationship between mass and acceleration?

    <p>Mass is inversely proportional to acceleration</p> Signup and view all the answers

    What is true about forces that are opposite in direction?

    <p>They can be balanced or unbalanced</p> Signup and view all the answers

    What happens to the acceleration of an object as its mass increases?

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

    What do action and reaction forces always have in common?

    <p>The same magnitude</p> Signup and view all the answers

    What is momentum a measure of?

    <p>The resistance of an object to changes in its motion</p> Signup and view all the answers

    What is the unit of impulse?

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

    What is the primary difference between mass and weight?

    <p>Mass is constant, while weight varies with location</p> Signup and view all the answers

    What is the purpose of the impulse-momentum theorem?

    <p>To relate the change in momentum of an object to the impulse applied</p> Signup and view all the answers

    What is weight a measure of?

    <p>The force of gravity on an object</p> Signup and view all the answers

    What is the formula for weight?

    <p>W = m * g</p> Signup and view all the answers

    What happens to an object's weight when it is located on the moon compared to Earth?

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

    What describes the tendency for mass and matter to resist a change in motion?

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

    What law of motion states that an object at rest or in motion will tend to stay that way unless acted upon by an unbalanced force?

    <p>Newton's First Law</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 property of matter was described by many thinkers including Aristotle, Galileo, and Newton?

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

    In the equation F = ma, what does the 'F' represent?

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

    Which of the following is an example of a fundamental force on Earth?

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

    What is a free-body diagram used for when analyzing forces acting on an object?

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

    In which direction does weight act on an object due to gravity?

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

    Which kind of force is weight an example of?

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

    What does Newton's third law of motion state?

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

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