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?
22 m22\ \mathrm{m}22 m
36 m36\ \mathrm{m}36 m
24 m24\ \mathrm{m}24 m
16 m16\ \mathrm{m}16 m
126 exam-style questions on Edexcel GCSE Physics 2.5 Stopping and braking distances, covering 2.5.1 Stopping distance and reaction time, 2.5.2 Factors affecting stopping distance, 2.5.3 Dangers of large decelerations, and 2.5.4 Braking distance and initial speed. Each one has a worked solution and a mark scheme showing where the marks go.