GCSE Physics (AQA)

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Stopping Distance

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Forces Forces and motion

Stopping Distance

5:10 Stopping Distance
Spec 4.5.6.3.1
Previous Terminal Velocity Next Reaction Times
  • Stopping distance is the total distance a car travels from the moment a need to stop appears until it actually stops.
  • Stopping distance is determined by thinking and braking distances.
  • Thinking distance is the distance traveled after a need to stop appears but before the brakes are applied.
  • Braking distance is the distance traveled after the brakes are applied until the car stops.
  • Reaction time is the time between the need to stop and the driver applying the brakes.
  • Reaction time and the car's speed determine the thinking distance.
  • To reduce thinking distance, one can drive at a slower speed or reduce reaction time.
  • Braking involves applying a frictional force to the car's wheels, causing deceleration.
  • The car continues to travel during deceleration, as speed decreases gradually, not instantly.
  • It's important to define and differentiate between thinking, braking, and stopping distances for exams.

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