Edexcel IGCSE Physics 1.19 Stopping distance

Practise calculating stopping distance from thinking and braking distances, and distinguishing what each distance means.

Exam points

add thinking distance and braking distance to calculate the stopping distance in metres
distinguish thinking distance from braking distance in written descriptions or option choices

[Maximum number: 3]

The graph shows how the thinking distance and the braking distance vary with the speed of a car.

Figure for Question 1.19 Stopping distance question 1 — Edexcel IGCSE Physics

Determine the stopping distance of the car when the speed of the car is 20 m/s.

stopping distance = ............ m

idea that stopping distance = thinking distance + braking distance;

correct reading of either distance;

correct evaluation;

e.g.

stopping distance = thinking distance + braking distance

thinking distance $=10.0 \mathrm{~m} /$ braking distance $=26.5 \mathrm{~m}$

stopping distance $=(10.0+26.5)=36.5(\mathrm{~m})$

stated or implied

allow 26.0-27.0 (m) for braking distance allow 10.0-10.5 (m) for thinking distance allow 36.0-37.5 (m)

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1.19 Stopping distance question 1