Physics (AS & A Level) · May / June 2023 · Paper 12 · Question 16

A variable force is applied to ensure that a constant power is supplied to a train. Which graph best shows the variation of the force F applied with the velocity v of the train?

1. AGraph A: F decreasing curve from high value at v=0
2. BGraph B: F increasing linearly from origin
3. CGraph C: F increasing curve from origin, concave down
4. DGraph D: F increasing curve from origin, concave up

As printed in the paper