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Chapter 10 Practice Paper: Momentum and impacts (Higher) — question paper

QuizQuipPractice Series
QQ/GCSE-PHYS/CH10

GCSE (9–1) · GCSE Physics (Higher (Higher-tier content))

Chapter 10 Practice Paper

Momentum and impacts (Higher)

Duration: 40 minutes
Total: 30 marks
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READ THESE INSTRUCTIONS FIRST

  • Answer all questions.
  • Section A contains ten multiple-choice questions. Choose one answer, A, B, C or D, for each.
  • Section B contains structured questions. Write your answers in the spaces provided.
  • You may use a calculator.
  • The number of marks is given in brackets [ ] at the end of each question or part question.
  • The total mark for this paper is 30.

Original practice material written for the MOE GCSE Physics syllabus. It is not an official MOE or school examination paper. Chapter 10: momentum p = m v, conservation of momentum, collisions and recoil, F t = Δ(m v), impact forces and vehicle safety features.

For Examiner’s Use
Section A/ 10
Section B/ 20
Total/ 30

Section A: Multiple-choice questions[10 marks]

Choose one answer for each question. Each question is worth 1 mark.

  1. 1

    Momentum is defined as

    1. Amass × velocity
    2. Bforce × distance
    3. Cmass × acceleration
    4. Denergy ÷ time
    ( )
  2. 2

    A momentum value quoted as 24 could carry the unit

    1. Akg m/s²
    2. Bkg m/s
    3. CN m
    4. DJ
    ( )
  3. 3

    In a closed system, total momentum

    1. Aincreases in explosions
    2. Bhalves each second
    3. Cis conserved
    4. Dequals the total kinetic energy
    ( )
  4. 4

    A 4.0 kg object at 3.0 m/s has momentum

    1. A12 kg m/s
    2. B1.3 kg m/s
    3. C7.0 kg m/s
    4. D0.75 kg m/s
    ( )
  5. 5

    Objects that stick together after colliding move with a speed found by dividing total momentum by

    1. Athe larger mass
    2. Bthe smaller mass
    3. Cthe collision time
    4. Dthe combined mass
    ( )
  6. 6

    Increasing the time of a collision (same momentum change) makes the force

    1. Alarger
    2. Bzero
    3. Cdouble
    4. Dsmaller
    ( )
  7. 7

    A crumple zone protects by

    1. Aextending the collision time
    2. Bstopping the car instantly
    3. Creducing the car’s mass
    4. Dbouncing the car back
    ( )
  8. 8

    A gun recoils because of

    1. Aconservation of charge
    2. Bair resistance
    3. Cfriction with the hand only
    4. Dconservation of momentum
    ( )
  9. 9

    A 60 kg passenger stopping from 12 m/s changes momentum by

    1. A5 kg m/s
    2. B72 kg m/s
    3. C720 kg m/s
    4. D0.2 kg m/s
    ( )
  10. 10

    A seat belt stretches slightly during a crash. This is designed to

    1. Aincrease the force
    2. Bincrease the stopping time
    3. Creduce the momentum change
    4. Dstop the car faster
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 11

    A supermarket trolley of mass 18 kg rolls at 2.0 m/s into a stationary trolley of mass 12 kg; they lock together.

    1. (a)

      Calculate the momentum before the collision.

      [1]
    2. (b)

      Calculate their common speed afterwards.

      [3]
    3. (c)

      Explain why the moving trolley slows down.

      [2]
  2. 12

    This question is about impact forces.

    1. (a)

      A 75 kg cyclist on a bike of mass 15 kg travels at 8.0 m/s and stops in 0.50 s. Calculate the average braking force.

      [3]
    2. (b)

      The cyclist instead hits a wall and stops in 0.05 s. Calculate the force.

      [2]
    3. (c)

      State the factor by which the force has grown and link it to the times.

      [2]
    4. (d)

      Name the cyclist safety item that applies the same principle.

      [1]
    5. (e)

      Explain why the cyclist’s kinetic energy does not disappear.

      [1]
  3. 13

    An astronaut of mass 120 kg (suited) is floating at rest relative to her ship and throws a 2.0 kg tool kit away at 6.0 m/s.

    1. (a)

      State the total momentum before the throw.

      [1]
    2. (b)

      Calculate the momentum the tool kit carries once thrown.

      [1]
    3. (c)

      Calculate the astronaut’s recoil velocity.

      [2]
    4. (d)

      Explain how she can use this idea to move back to the ship.

      [1]

— End of paper —