A bus travels at 16 m/s. Its mass is 6000 kg and the constant braking force is 12000 N. The bus must stop within a distance of 80 m from the point its driver detects a hazard.
Calculate the maximum reaction time that allows the bus to stop within 80 m.
The braking force is reduced to 6000 N. The speed of the bus is unchanged.
Explain whether the bus can still stop within 80 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.