Lesson R1

R1 Forces and Newton's first law Quiz: AQA Maths, Unit 12

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson R1, Forces and Newton's first law: 20 multiple choice questions for the AQA Maths (7357), Unit 12: Mechanics, written with Revision Ninja.

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The 20 questions

  1. According to Newton's first law, what remains constant if zero resultant force acts on a body?

    • Displacement
    • Acceleration
    • Velocity
    • Position

  2. In mechanics, what type of physical quantity is a force?

    • Base unit
    • Scalar quantity
    • Vector quantity
    • Dimensionless ratio

  3. A 10 N weight rests on a table and the normal reaction is 10 N. What is the resultant force on it?

    • 0 N
    • 5 N
    • 10 N
    • 20 N

  4. A car moves at constant velocity on a straight road under a driving force of 500 N. What is the resistive force?

    • 0 N
    • 500 N
    • 1000 N
    • 250 N

  5. What is the resultant force acting on a particle that remains at rest?

    • Non-zero
    • Equal to weight
    • Equal to mass
    • Zero

  6. What property of an object describes its resistance to changes in motion?

    • Friction
    • Momentum
    • Weight
    • Inertia

  7. Forces of 3 N east and 4 N north act on a particle. What is the magnitude of the resultant?

    • 12 N
    • 1 N
    • 7 N
    • 5 N

  8. Two forces of 5 N act in the same direction on a particle. What is the resultant?

    • 10 N
    • 5 N
    • 0 N
    • 7.1 N

  9. A particle at rest is acted on by 4 N east and 9 N west. What is the resultant force?

    • 4 N east
    • 5 N west
    • 13 N west
    • 5 N east

  10. What describes the motion of a spacecraft drifting in deep space with zero resultant force?

    • Increasing speed
    • Constant acceleration
    • Gradually slowing down
    • Constant velocity

  11. A particle is in equilibrium under forces 2 N east, 3 N north and a third force F. What is the magnitude of F?

    • 5 N
    • 2.5 N
    • sqrt(13) N, about 3.6 N
    • 1 N

  12. The forces (3i + 4j) N and (-i + 2j) N act on a particle. What is the magnitude of the resultant, to 1 decimal place?

    • 4.5 N
    • 8.0 N
    • 6.3 N
    • 2.8 N

  13. Three equal coplanar forces act on a particle at 120 degrees to each other. What is their resultant force?

    • Zero
    • 5 N
    • 15 N
    • 10 N

  14. Forces (2i - j) N and (ai + 3j) N have resultant (4i + 2j) N. What is a?

    • 4
    • 6
    • -2
    • 2

  15. A particle moves with velocity (3i + 4j) m s^-1 and the resultant force on it is zero. What is its velocity after 10 s?

    • 3i - 4j m s^-1
    • 3i + 4j m s^-1
    • 0 m s^-1
    • 30i + 40j m s^-1

  16. A box slides at constant velocity across a rough floor when pulled by a 40 N horizontal force. What is the friction force?

    • 80 N
    • 40 N
    • 0 N
    • 20 N

  17. Two forces of 10 N act on a particle with an angle of 60 degrees between them. What is the magnitude of the resultant, to 1 decimal place?

    • 10.0 N
    • 20.0 N
    • 17.3 N
    • 14.1 N

  18. A particle is in equilibrium under three forces, two of which are 6 N each at 90 degrees. What is the magnitude of the third force, to 1 decimal place?

    • 3.0 N
    • 8.5 N
    • 12.0 N
    • 6.0 N

  19. An aeroplane flies at constant velocity in level flight. What balances the thrust force?

    • Drag
    • Gravity
    • Weight
    • Lift

  20. What is the acceleration of a particle subjected to zero resultant force?

    • Proportional to mass
    • Constant and non-zero
    • Equal to gravity
    • Zero

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