Lesson 6.1.1

6.1.1 Impulse and Newton's second law Quiz: Pearson Edexcel Physics, Unit 6

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 6.1.1, Impulse and Newton's second law: 20 multiple choice questions for the Pearson Edexcel Physics (9PH0), Unit 6: Further Mechanics, written with Revision Ninja.

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The 20 questions

  1. Impulse of a force is defined as which quantity?

    • The force divided by the time for which it acts
    • The product of the mass and the square of the velocity
    • The product of the force and the time for which it acts
    • The product of the force and the distance moved in the direction of the force

  2. Which SI unit is equivalent to the newton second (N s) for impulse?

    • kg s^-2
    • kg m s^-2
    • kg m s^-1
    • kg m^2 s^-1

  3. Newton's second law can be expressed in terms of momentum as: the resultant force equals

    • the rate of change of momentum
    • the rate of change of kinetic energy of the object
    • the product of the mass and the displacement of the object
    • the momentum divided by the mass of the object

  4. A constant force of 5 N acts on an object for 2 s. What is the impulse delivered?

    • 7 N s
    • 2.5 N s
    • 10 N s
    • 3 N s

  5. A 0.40 kg ball moving at 6.0 m s^-1 is brought to rest by a wall. What is the magnitude of its change in momentum?

    • 6.4 kg m s^-1
    • 15 kg m s^-1
    • 2.4 kg m s^-1
    • 0.067 kg m s^-1

  6. A 0.15 kg ball has its velocity changed from 20 m s^-1 forwards to 10 m s^-1 backwards. What is the impulse given to the ball?

    • 4.5 N s, directed backwards
    • 1.5 N s, directed forwards
    • 3.0 N s, directed backwards
    • 4.5 N s, directed forwards

  7. A constant resultant force of 12 N acts on a 3.0 kg trolley that starts from rest for 4.0 s. What is its final speed?

    • 0.25 m s^-1
    • 4.0 m s^-1
    • 16 m s^-1
    • 48 m s^-1

  8. A cricket ball of mass 0.16 kg moving at 30 m s^-1 is caught and brought to rest in 0.060 s. What is the average force exerted on the ball?

    • 80 N
    • 5.3 N
    • 0.29 N
    • 800 N

  9. The area under a force-time graph represents which quantity?

    • The work done by the force on the object
    • The impulse delivered to the object
    • The kinetic energy gained by the object
    • The power delivered by the force to the object

  10. A 1200 kg car accelerates uniformly from 10 m s^-1 to 25 m s^-1 in 8.0 s. What is the average resultant force on the car?

    • 150 N
    • 2250 N
    • 18000 N
    • 1800 N

  11. A 0.50 kg trolley's momentum changes from 1.0 kg m s^-1 to 3.0 kg m s^-1 in 0.40 s. What is the average resultant force?

    • 1.5 N
    • 2.0 N
    • 0.80 N
    • 5.0 N

  12. A crash helmet increases the time over which the head decelerates. For the same change in momentum, what happens to the average force on the head?

    • It is reduced
    • It is increased
    • It is doubled
    • It is unchanged

  13. A force increases uniformly from 0 N at t = 0 to 10 N at t = 2 s. What is the impulse over this interval?

    • 20 N s
    • 5 N s
    • 2 N s
    • 10 N s

  14. A 0.20 kg ball hits a vertical wall horizontally at 4.0 m s^-1 and rebounds horizontally at 3.0 m s^-1. The contact lasts 0.02 s. What is the average force on the ball?

    • 1.4 N
    • 14 N
    • 70 N
    • 35 N

  15. A 2.0 kg object has velocity v = 3t + 1 (m s^-1, t in s). What is the impulse delivered between t = 0 and t = 2 s?

    • 16 N s
    • 12 N s
    • 6 N s
    • 7 N s

  16. A resultant force F = 4t newtons acts on a 0.5 kg object initially at rest from t = 0 to t = 3 s. What is its final speed?

    • 36 m s^-1
    • 9 m s^-1
    • 6 m s^-1
    • 18 m s^-1

  17. Water leaves a hose at a mass flow rate of 0.5 kg s^-1 and hits a wall at 20 m s^-1, stopping without splashing back. What is the average force on the wall?

    • 0.025 N
    • 10 N
    • 40 N
    • 20 N

  18. A 0.060 kg tennis ball moving at 40 m s^-1 is struck by a racket and leaves at 50 m s^-1 in the opposite direction. What is the magnitude of the impulse?

    • 5.4 N s
    • 3.0 N s
    • 0.6 N s
    • 2.4 N s

  19. A 1.0 kg object starts from rest. A 3.0 N force acts for 2.0 s, then a 5.0 N force in the same direction acts for 1.0 s. What is its final speed?

    • 8.0 m s^-1
    • 5.5 m s^-1
    • 11 m s^-1
    • 15 m s^-1

  20. Which statement about impulse is correct?

    • Impulse equals the momentum of the object before the force is applied
    • Impulse equals the change in momentum of the object acted on by the resultant force
    • Impulse always equals the work done by the force on the object
    • Impulse equals the average kinetic energy gained by the object

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