Lesson 3.03c

3.03c Newton's second law for straight-line motion Quiz: OCR Maths, Unit 18

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3.03c, Newton's second law for straight-line motion: 20 multiple choice questions for the OCR Maths (H240), Unit 18: Forces and Newton's Laws, written with Revision Ninja.

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The 20 questions

  1. What is the formula for Newton's second law relating resultant force, mass, and acceleration?

    • F = mv
    • F = ma
    • F = v/t
    • F = m/a

  2. A 5 kg mass accelerates at 3 m s^-2. What is the magnitude of the resultant force?

    • 0.6 N
    • 8 N
    • 1.67 N
    • 15 N

  3. A resultant force of 20 N acts on a 4 kg mass. What is its acceleration?

    • 5 m s^-2
    • 16 m s^-2
    • 0.2 m s^-2
    • 80 m s^-2

  4. What is the standard SI unit used to measure force in Newton's second law?

    • Pascal
    • Newton
    • Watt
    • Joule

  5. A resultant force of 12 N produces an acceleration of 4 m s^-2. What is the mass?

    • 3 kg
    • 8 kg
    • 0.33 kg
    • 48 kg

  6. Which component of weight acts down a smooth slope inclined at angle θ to the horizontal?

    • mg cos(θ)
    • mg
    • mg sin(θ)
    • mg tan(θ)

  7. A 2 kg mass accelerates at (4i - 3j) m s^-2. What is the resultant force vector?

    • (8i - 6j) N
    • (2i - 1.5j) N
    • (4i - 3j) N
    • (6i - 5j) N

  8. A force vector is given by (3i + 4j) N. What is its magnitude?

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

  9. A force of (6i + 8j) N acts on a 2 kg body. What is the acceleration vector?

    • (4i + 6j) m s^-2
    • (8i + 10j) m s^-2
    • (12i + 16j) m s^-2
    • (3i + 4j) m s^-2

  10. A person of mass m stands in a lift accelerating upwards at a. What is the normal reaction?

    • m(g - a)
    • ma
    • mg
    • m(g + a)

  11. A lift of mass 500 kg accelerates downwards at 2 m s^-2. What is the tension? (g = 9.8)

    • 1000 N
    • 3900 N
    • 5900 N
    • 4900 N

  12. A particle slides down a smooth plane inclined at 30° to the horizontal. What is its acceleration?

    • 2.45 m s^-2
    • 4.9 m s^-2
    • 8.5 m s^-2
    • 9.8 m s^-2

  13. In standard A level mechanics applications of F = ma, what property of mass is assumed?

    • Variable mass
    • Zero mass
    • Increasing mass
    • Constant mass

  14. A 10 N force acts at 60° above the horizontal on a 2 kg mass. What is horizontal acceleration?

    • 2.5 m s^-2
    • 5 m s^-2
    • 4.33 m s^-2
    • 8.66 m s^-2

  15. In 2D vector notation, what horizontal component does the top value of a column vector represent?

    • j component
    • k component
    • i component
    • Magnitude

  16. Two forces, (2i + 5j) N and (4i + 1j) N, act on 3 kg. What is the acceleration?

    • (18i + 18j) m s^-2
    • (3i + 3j) m s^-2
    • (2i + 2j) m s^-2
    • (6i + 6j) m s^-2

  17. A crate moves along a straight road at a constant velocity. What is the resultant force?

    • 0 N
    • Equal to weight
    • Equal to friction
    • Greater than zero

  18. A crane lifts a 100 kg crate upwards with an acceleration of 1 m s^-2. What is cable tension?

    • 100 N
    • 1080 N
    • 980 N
    • 880 N

  19. A 1000 kg car has driving force 1500 N and resistance force 500 N. What is its acceleration?

    • 2 m s^-2
    • 1 m s^-2
    • 1.5 m s^-2
    • 0.5 m s^-2

  20. A body of mass m rests on a horizontal plane with no vertical applied forces. What is the normal reaction?

    • 0
    • ma
    • mg
    • m/g

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