In a packaging test, two identical boxes are dropped. Each box is moving at 6.0 m/s when it hits the surface below it.
Box P lands on a hard floor and comes to rest in 0.020 s.
Box Q lands on a foam pad and comes to rest in 0.10 s.
Calculate the ratio of the deceleration of box P to the deceleration of box Q.
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.