Stopping Distances (AQA GCSE Physics): Flashcards

Distance traveled from when danger appears until car completely stops

Stopping distance = Thinking distance + Braking distance

Distance traveled while driver reacts before pressing brakes

Distance traveled while car slows down after brakes applied

Speed, tiredness, distractions, alcohol/drugs

Thinking distance doubles

Speed

Braking distance increases four times

Directly proportional to speed

Proportional to square of speed ($v^2$)

23m (9m thinking + 14m braking)

74m (18m thinking + 56m braking)

Speed, road conditions, tyres, brakes, mass

$KE = \frac{1}{2}mv^2$