Stopping distances and momentum

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Explain stopping distance as thinking distance plus braking distance and the factors that affect each (speed, tiredness, drugs, alcohol, distractions, road and weather conditions, tyres and brakes)
Estimate reaction times (typically 0.2–0.9 s) and describe methods of measuring them; interpret graphs of stopping distance against speed

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(HT) Calculate momentum (p = mv) and apply conservation of momentum to collisions and explosions; (Edexcel, OCR) use F = mΔv/Δt to explain vehicle safety features

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