A car travelling at 20 m/s has a braking distance of 25 m. On a wet road, the constant resultant braking force is halved. The driver’s reaction time is 0.80 s. What is the stopping distance on the wet road at the same initial speed?
41 m41\ \mathrm{m}41 m
58 m58\ \mathrm{m}58 m
82 m82\ \mathrm{m}82 m
66 m66\ \mathrm{m}66 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.