Lesson 4.5.6.3

4.5.6.3 Forces and braking Quiz: AQA Physics, Unit 5

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.5.6.3, Forces and braking: 20 multiple choice questions for the AQA GCSE Physics (8463), Unit 5: Forces, written with Revision Ninja.

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The 20 questions

  1. What two components make up a vehicle's total stopping distance?

    • Speed and acceleration
    • Reaction and friction
    • Gravity and drag
    • Thinking and braking

  2. Typical human reaction times for a driver range over roughly which values?

    • 0.02 s to 0.09 s
    • 0.9 s to 2.5 s
    • 0.2 s to 0.9 s
    • 2 s to 9 s

  3. If a car's speed doubles, what happens to its braking distance for a given force?

    • Quadruples
    • Doubles
    • Stays the same
    • Halves

  4. Which factor does NOT affect a driver's reaction time?

    • Tiredness
    • Distractions
    • Alcohol
    • Car colour

  5. A driver travels 9 m during their reaction time while moving at 15 m/s. What is the reaction time?

    • 0.06 s
    • 6 s
    • 0.6 s
    • 1.67 s

  6. Which road condition increases a vehicle's braking distance?

    • Dry tarmac
    • New road surface
    • Clear visibility
    • Icy surface

  7. According to the specification, which vehicle parts affect braking distance when worn?

    • Brakes or tyres
    • Exhaust or mirrors
    • Steering or suspension
    • Headlights or wipers

  8. What major hazard is caused by very large decelerations in road vehicles?

    • Brake overheating
    • Tyre freezing
    • Battery drainage
    • Engine flooding

  9. Into what type of energy is kinetic energy mainly converted when a vehicle brakes?

    • Elastic energy
    • Thermal energy
    • Nuclear energy
    • Chemical energy

  10. How much greater is the braking distance at 20 m/s compared to 10 m/s?

    • Twice as far
    • Four times further
    • Eight times further
    • Three times further

  11. A car slows from 20 m/s to rest in 4 s. What is its deceleration?

    • 5 m/s2
    • 16 m/s2
    • 0.2 m/s2
    • 80 m/s2

  12. On a speed-stopping distance graph, what does a steadily increasing gradient show?

    • Non-linear increase
    • Constant acceleration
    • Direct proportionality
    • Zero deceleration

  13. Which part of stopping distance is directly lengthened by driver tiredness?

    • Braking distance
    • Vehicle mass
    • Friction distance
    • Thinking distance

  14. Why does an icy road result in a longer braking distance?

    • Higher air resistance
    • Increased vehicle weight
    • Enhanced engine power
    • Reduced tyre friction

  15. What is the main danger of worn tyres during an emergency stop?

    • Engine stalling
    • Increased stopping distance
    • Steering failure
    • Increased thinking time

  16. A driver's thinking distance is 6 m at 12 m/s. With the same reaction time, what is the thinking distance at 24 m/s?

    • 12 m
    • 24 m
    • 18 m
    • 3 m

  17. Three students record reaction times of 0.25 s, 0.30 s and 0.35 s. What is the mean reaction time?

    • 0.35 s
    • 0.30 s
    • 0.90 s
    • 0.25 s

  18. Which factor is most likely to increase a driver's reaction time?

    • Dry weather
    • Good alertness
    • Alcohol consumption
    • Clear vision

  19. If a vehicle's braking force doubles for a constant mass, what happens to deceleration?

    • It quadruples
    • It stays constant
    • It doubles
    • It halves

  20. A 1000 kg car decelerates at 5 m/s2. What is the braking force?

    • 200 N
    • 5000 N
    • 50 000 N
    • 1005 N

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