A car brakes from 10 m/s and travels 5 m before stopping. It then brakes from 30 m/s in the same conditions. The driver’s reaction time is 0.50 s and the braking force is constant and unchanged. What is the stopping distance in the second test?
30 m30\ \mathrm{m}30 m
50 m50\ \mathrm{m}50 m
90 m90\ \mathrm{m}90 m
60 m60\ \mathrm{m}60 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.