A coach is tested on a closed road. When travelling at 12 m/s, the coach has a braking distance of 12 m.
The same coach then travels at 18 m/s. The driver's reaction time is 0.70 s.
The mean braking force is the same in both tests. The driver sees a safety barrier 38 m ahead.
Use calculations to determine whether the coach stops before it reaches the safety barrier.
Show your working.
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.