Lesson 6.5.4.3.4

6.5.4.3.4 Factors affecting braking distance 2 Quiz: AQA Combined Science, Unit 22

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 6.5.4.3.4, Factors affecting braking distance 2: 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 22: Forces, written with Revision Ninja.

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The 20 questions

  1. When brakes are applied, friction work directly removes what from the vehicle?

    • Chemical energy
    • Potential energy
    • Elastic energy
    • Kinetic energy

  2. The kinetic energy removed by vehicle brakes is mainly transferred into what energy store?

    • Thermal energy
    • Chemical energy
    • Nuclear energy
    • Sound energy

  3. When a vehicle's brakes are used, their temperature:

    • Decreases
    • Increases
    • Stays the same
    • Becomes zero

  4. For a fixed stopping distance, what does a faster vehicle require?

    • Lighter vehicle mass
    • Shorter reaction time
    • Smaller braking force
    • Greater braking force

  5. A greater braking force on a vehicle gives:

    • A smaller deceleration
    • The same deceleration
    • A greater deceleration
    • A longer thinking distance

  6. What are two potential dangers caused by extremely large vehicle decelerations?

    • Overheating and skidding
    • Freezing and stalling
    • Accelerating and lifting
    • Flooding and rusting

  7. A car at 30 m/s must stop within 40 m. The deceleration needed is about:

    • 11.25 m/s2
    • 5 m/s2
    • 20 m/s2
    • 7.5 m/s2

  8. A 1000 kg car decelerates at 8 m/s2. The braking force on the car is:

    • 1000 N
    • 80 N
    • 125 N
    • 8000 N

  9. Which driving action produces the largest vehicle deceleration?

    • Gentle slowing
    • Constant cruising
    • Hard braking
    • Accelerating uphill

  10. A car at 20 m/s is brought to rest over a fixed distance. Compared with a car at 10 m/s over the same distance, the braking force needed is:

    • Four times greater
    • The same
    • Half as great
    • Twice as great

  11. A 1200 kg car decelerates at 5 m/s2. The braking force is:

    • 6000 N
    • 60 N
    • 240 N
    • 1200 N

  12. (Harder) A 1500 kg vehicle at 15 m/s stops in 22.5 m. The braking force is about:

    • 7500 N
    • 5000 N
    • 150 N
    • 3375 N

  13. (HT only) A 10000 kg lorry decelerates at 1 m/s2. The braking force is:

    • 1000 N
    • 10 N
    • 100000 N
    • 10000 N

  14. The kinetic energy of a moving vehicle depends on its mass and what feature of its speed?

    • Double
    • Square
    • Cube
    • Square root

  15. Doubling a car's speed multiplies its kinetic energy by:

    • 4
    • 2
    • 8
    • 1

  16. What risk is caused by very large vehicle decelerations?

    • Increased mass
    • Loss of control
    • Shorter stopping distance
    • Higher gravity

  17. (HT only) A 1000 kg car at 25 m/s stops in 50 m. The average braking force is about:

    • 625 N
    • 6250 N
    • 25000 N
    • 1250 N

  18. In which direction does the friction force act on a braking wheel?

    • Perpendicular upwards
    • Same as motion
    • Perpendicular downwards
    • Opposite to motion

  19. Why is braking gently and early safer for a vehicle?

    • Increased kinetic energy
    • Constant velocity
    • Zero friction
    • Smaller deceleration

  20. How does braking distance change when vehicle speed doubles?

    • Quadruples
    • Stays the same
    • Doubles
    • Halves

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