A car is travelling along a road at 20 m/s.
The driver sees a hazard and applies the brakes. The driver's reaction time is 0.70 s.
State what is meant by the thinking distance.
Use the equation: distance=speed×time\text{distance} = \text{speed} \times \text{time}distance=speed×time
Calculate the thinking distance.
State two factors, other than speed, that increase the thinking distance.
Write down the equation that links overall stopping distance, thinking distance and braking distance.
50 exam-style questions on OCR GCSE Physics 8.1 Physics on the move, covering 8.1.1 Typical everyday speeds, 8.1.2 Typical everyday accelerations, 8.1.3 Ratios, units and rates on the road, 8.1.4 Human reaction times, 8.1.5 Factors affecting stopping distance, 8.1.6 Stopping distances at different speeds, 8.1.7 Dangers of large decelerations, 8.1.8 Estimating forces in road situations, and 8.1.9 Estimating the effects of large accelerations. Each one has a worked solution and a mark scheme showing where the marks go.