Two motorbikes are each travelling at 12 m/s when their riders apply the brakes. The first motorbike stops in 3.0 s. The second motorbike stops in 9.0 s.
Calculate the ratio of the decelerations of the two motorbikes. Give your answer in the form first motorbike : second motorbike.
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.