Physics – Motion and Friction

1. To which type of force does Newton’s third law of motion apply?

  1. Only gravitational force
  2. Only electromagnetic force
  3. Only electric force
  4. All types of forces
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Answer: Option D. All types of forces

2. What is the apparent weight of a person when the elevator descends?

  1. Equal to the actual weight
  2. More than the actual weight
  3. Less than the actual weight
  4. Equal to zero
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Answer: Option C. Less than the actual weight

3. What is the resistance of an object to change its state of rest or motion?

  1. Inertia
  2. Momentum
  3. Velocity
  4. Acceleration
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Answer: Option A. Inertia

4. What is the force that acts on an object for a short time?

  1. Impulsive Force
  2. Constant Force
  3. Balanced Force
  4. Net Force
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Answer: Option A. Impulsive Force

5. What are the forces acting on a point called?

  1. Frictional Forces
  2. Unit Forces
  3. Concurrent Forces
  4. Short-range Forces
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Answer: Option C. Concurrent Forces