Lesson 3.2.2

3.2.2 Motion with non-uniform acceleration Quiz: OCR Physics, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3.2.2, Motion with non-uniform acceleration: 20 multiple choice questions for the OCR Physics (H156), Unit 2: Forces and motion, written with Revision Ninja.

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The 20 questions

  1. What term describes the resistive force experienced by an object moving through a fluid?

    • Normal force
    • Upthrust
    • Tension
    • Drag

  2. Which factor has no direct effect on the drag force acting on an object travelling through air?

    • Air density
    • Object speed
    • Object mass
    • Cross-sectional area

  3. What is the resultant force on a falling object when it reaches terminal velocity?

    • Maximum value
    • Equal to drag
    • Zero
    • Equal to weight

  4. How does acceleration change for an object falling with air resistance before reaching terminal velocity?

    • Decreases to zero
    • Remains constant at g
    • Decreases to g
    • Increases to g

  5. What happens to the gradient of a velocity-time graph as a falling object approaches terminal velocity?

    • Decreases to zero
    • Remains constant
    • Increases to infinity
    • Decreases to g

  6. What measurement is taken to determine terminal velocity of a ball bearing in a viscous liquid?

    • Total falling distance
    • Mass of liquid
    • Initial acceleration rate
    • Time between marks

  7. At high speeds in air, drag force on an object is proportional to which quantity?

    • Speed squared
    • Speed cubed
    • Speed
    • Square root speed

  8. A 80 kg parachutist falls at terminal velocity. Using g = 9.8 m s^-2, what is the drag force on the parachutist?

    • 8.2 N
    • 80 N
    • 784 N
    • 1568 N

  9. A 0.2 kg ball falls at terminal velocity. What is the net force on it?

    • 0.2 N
    • 9.8 N
    • 0 N
    • 1.96 N

  10. For a drag force proportional to v^2, doubling the speed multiplies the drag force by:

    • 8
    • 1
    • 2
    • 4

  11. An object of weight 10 N experiences a drag of 4 N while falling. Its mass is 1 kg. What is its acceleration?

    • 4 m s^-2 downwards
    • 6 m s^-2 downwards
    • 10 m s^-2 upwards
    • 14 m s^-2 downwards

  12. A falling object reaches a constant velocity of 8 m s^-1. Its weight is 12 N. What is the drag force on it?

    • 12 N
    • 24 N
    • 6 N
    • 0 N

  13. A ball bearing falls at constant speed through 0.20 m in 4.0 s in a viscous liquid. What is its terminal speed?

    • 0.5 m s^-1
    • 0.02 m s^-1
    • 0.8 m s^-1
    • 0.05 m s^-1

  14. A 0.6 kg object falls with weight 5.9 N and drag 2.0 N. What is the net force on it?

    • 7.9 N downwards
    • 3.9 N downwards
    • 3.9 N upwards
    • 5.9 N downwards

  15. When a parachute opens during a fall, the terminal velocity:

    • Decreases
    • Stays the same
    • Becomes zero
    • Increases

  16. A heavier object reaches a higher terminal velocity than a lighter object of identical shape because it requires a:

    • Larger drag force
    • Smaller upthrust
    • Larger upthrust
    • Smaller drag force

  17. An object of mass 4 kg falls with drag F = k v^2, where k = 0.25 kg m^-1. Using g = 9.8 m s^-2, what is its terminal velocity?

    • 156.8 m s^-1
    • 6.3 m s^-1
    • 12.5 m s^-1
    • 39.2 m s^-1

  18. A falling object of weight W has drag equal to 0.6 W. Using g = 9.8 m s^-2, what is its acceleration?

    • 5.9 m s^-2 downwards
    • 9.8 m s^-2 downwards
    • 3.9 m s^-2 downwards
    • 6.0 m s^-2 downwards

  19. A 0.5 kg object falls at 6 m s^-1 with a drag force of 0.8 N. Using g = 9.8 m s^-2, what is its acceleration?

    • 5.7 m s^-2 downwards
    • 8.2 m s^-2 downwards
    • 4.1 m s^-2 downwards
    • 9.8 m s^-2 downwards

  20. Why does the gradient of a falling object's velocity-time graph decrease over time?

    • Weight decreases
    • Drag force decreases
    • Gravity decreases
    • Acceleration decreases

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