Lesson 3.4.1.5

3.4.1.5 Newton's laws of motion Quiz: AQA Physics, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3.4.1.5, Newton's laws of motion: 20 multiple choice questions for the AQA Physics (7408), Unit 4: Mechanics and materials, written with Revision Ninja.

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The 20 questions

  1. According to Newton's first law, what quantity remains constant if the net force is zero?

    • Acceleration
    • Velocity
    • Displacement
    • Position

  2. What formula expresses Newton's second law for an object with constant mass?

    • F = m/a
    • F = mv
    • F = ma²
    • F = ma

  3. According to Newton's third law, how do interaction force pairs compare in magnitude and direction?

    • Unequal and opposite
    • Unequal and perpendicular
    • Equal and opposite
    • Equal and parallel

  4. What is one newton in SI base units?

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

  5. What does a free-body diagram display for a chosen object?

    • Velocities
    • Forces exerted
    • Forces on object
    • Accelerations

  6. What force forms a Newton's third law pair with Earth's pull on a book?

    • Book's weight on table
    • Upward air resistance
    • Book's pull on Earth
    • Normal contact force

  7. What is the acceleration of an object when the resultant force acting on it is zero?

    • 1.0 m s⁻²
    • 9.81 m s⁻²
    • Zero
    • Infinite

  8. If the net force on a body is doubled while its mass is unchanged, what happens to its acceleration?

    • It quadruples
    • It doubles
    • It is unchanged
    • It halves

  9. What is the acceleration of a 2 kg mass pushed by a force that gives F = 6 N?

    • 0.67 m/s^2
    • 3 m/s^2
    • 5 m/s^2
    • 1.5 m/s^2

  10. A 10 N resultant force acts on a 4 kg mass. What is its acceleration?

    • 40 m/s^2
    • 14 m/s^2
    • 0.4 m/s^2
    • 2.5 m/s^2

  11. A book at rest on a table has weight W. What is the normal reaction force from the table?

    • greater than W
    • zero
    • equal to W
    • twice W

  12. How does cable tension compare to weight when a lift accelerates upwards?

    • Tension is smaller
    • Tension is zero
    • Tension is equal
    • Tension is greater

  13. A 3 kg and a 2 kg block on a frictionless surface are pulled together by a 10 N force. What is their acceleration?

    • 0.2 m/s^2
    • 3.3 m/s^2
    • 5 m/s^2
    • 2 m/s^2

  14. A 1 kg object is pushed by a 5 N force from rest for 2 s. What is its final speed?

    • 5 m/s
    • 10 m/s
    • 2.5 m/s
    • 20 m/s

  15. A 60 kg person stands in a lift that accelerates upward at 2 m/s^2. Taking g = 10 m/s^2, what is the normal reaction from the floor?

    • 720 N
    • 480 N
    • 600 N
    • 840 N

  16. A 1500 kg car accelerates from 0 to 20 m/s in 10 s. What driving force is needed, ignoring friction?

    • 300 N
    • 1500 N
    • 3000 N
    • 20 N

  17. A block rests at rest on a rough incline at angle θ. What is the friction force on it?

    • mg sin(theta)
    • mg tan(theta)
    • mg cos(theta)
    • mg

  18. A 2 kg block is pulled by a 10 N force against 4 N of friction. What is its acceleration?

    • 7 m/s^2
    • 2 m/s^2
    • 5 m/s^2
    • 3 m/s^2

  19. What property of a body measures its resistance to a change in motion?

    • Inertia
    • Weight
    • Momentum
    • Impulse

  20. In an experiment verifying Newton's second law, what does the gradient of an acceleration-force graph give?

    • 1/m
    • g
    • F/m
    • m

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