Physics (AS & A Level) · Oct / Nov 2022 · Paper 13 · Question 21

The diagram shows a transverse wave on a rope. The wave is travelling from left to right. At the instant shown, the points P and Q on the rope have zero displacement and maximum displacement respectively. [diagram of transverse wave with points P and Q, direction of wave to the right] Which row describes the direction of motion, if any, of the points P and Q at this instant?

1. Apoint P: downwards; point Q: stationary
2. Bpoint P: stationary; point Q: downwards
3. Cpoint P: stationary; point Q: upwards
4. Dpoint P: upwards; point Q: stationary

As printed in the paper