A car is travelling at a constant speed of 24 m s-1 on a dry, level road. The driver's reaction time is 0.75 s and the maximum deceleration of the car under braking is 6.0 m s-2.
On a rainy day, the coefficient of friction between the car's tyres and the road surface is halved, and the driver's reaction time increases by 20% due to fatigue.
If the car is travelling at the same speed of 24 m s-1, what is the percentage increase in the total stopping distance of the car on the rainy day compared to the dry day?
73%73\%73%
78%78\%78%
87%87\%87%
178%178\%178%
Practise OCR GCSE Physics Physics on the move with exam-style questions for Foundation and Higher tier. 38 questions, matched to the OCR GCSE Physics (J249) specification and written in Paper 1 and Paper 2 (Foundation Tier) or Paper 3 and Paper 4 (Higher Tier) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.