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2 Motion and forces

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Question 24

A road-safety team measures the stopping distance of a minibus at two different speeds on a dry runway. The driver takes the same time to react in both tests. Nothing that affects braking changes between the tests, so the distance the minibus travels after the brakes are applied can be taken to be proportional to the square of its speed.

Speed in m/s\mathrm{m/s}m/sStopping distance in m\mathrm{m}m
1014
2044

Using this model, what is the braking distance of the minibus at a speed of 25 m/s?

[1]
A

50 m50\ \mathrm{m}50 m

B

65 m65\ \mathrm{m}65 m

C

15 m15\ \mathrm{m}15 m

D

55 m55\ \mathrm{m}55 m

Markscheme

2 Motion and forces Questions

  1. GCSE
  2. /Physics
  3. /2 Motion and forces

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