An automated container terminal operates self-driving electric shuttles on steel rails. When rainfall is detected, the terminal's safety system immediately reduces the maximum operational speed of the shuttles.
Explain, in terms of forces and stopping distances, why this speed reduction is necessary to ensure the shuttles can stop safely within a fixed safety margin.
39 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.