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2 Motion and forces

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Question 2

Repeated braking has caused the brakes of a refuse collection lorry to overheat. The lorry is moving at a constant speed of 12 m/s when the driver notices a hazard. The brakes are applied 0.75 s later, and the lorry comes to rest 33 m beyond the point where the hazard was noticed. When the brakes are overheated, the constant resultant braking force is 23\dfrac{2}{3}32​ of the force produced at normal temperature.

What is the braking distance of the lorry at the same initial speed when the brakes are at normal temperature?

[1]
A

22 m22\ \mathrm{m}22 m

B

36 m36\ \mathrm{m}36 m

C

24 m24\ \mathrm{m}24 m

D

16 m16\ \mathrm{m}16 m

Markscheme

2 Motion and forces Questions

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

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