Physics · May / June 2025 · Paper 12 · Question 4

A car driver travelling at constant speed in a straight line sees a hazard in the road ahead at time = 0. The speed–time graph shows how the speed of the car changes from time = 0. [graph: speed vs time, areas X and Y] Three students suggest what area X and area Y represent. student 1 Area X represents the thinking distance. student 2 Area Y represents the stopping distance. student 3 Area X + area Y represents the stopping distance. Which students are correct?

1. A1 and 2
2. B1 and 3
3. C1 only
4. D2 only

As printed in the paper