Physics (AS & A Level) · May / June 2018 · Paper 12 · Question 28

The diagram shows a stationary wave, at time t = 0, that has been set up on a string fixed between points P and S. The nodes of the stationary wave occur on the string at P, Q, R and S. Point X is moving down at time t = 0. The points on the string vibrate with time period T and maximum amplitude 2 cm. The displacement s is positive in the upward direction. Which graph best shows the variation with t of the displacement s of point Y on the string?

1. AGraph A
2. BGraph B
3. CGraph C
4. DGraph D

As printed in the paper