On a later journey, a tram has 20% less total mass than on an earlier journey. Its speed when braking begins is 25% greater. The same constant resultant braking force acts on both journeys.
The braking distance on the later journey is 50 m. What was the braking distance on the earlier journey?
50 m50\ \mathrm{m}50 m
40 m40\ \mathrm{m}40 m
32 m32\ \mathrm{m}32 m
62.5 m62.5\ \mathrm{m}62.5 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.