An automated cargo monorail operates on an elevated outdoor track. The system's central computer receives data from a moisture sensor on the steel rails. When heavy rainfall is detected, the friction between the steel wheels and the rails is significantly reduced.
State the adjustment to the operating speed that the central computer should implement when heavy rainfall is detected to ensure the monorail can stop safely.
39 exam-style questions on Edexcel GCSE Physics 2.5 Stopping and braking distances. Each one has a worked solution and a mark scheme showing where the marks go.