Physics (AS & A Level) · May / June 2019 · Paper 11 · Question 22

A transverse wave in a medium has the waveform shown, where \(y\) = vertical displacement and \(x\) = horizontal distance. The speed of the wave is \(20.0\,\mathrm{cm\,s^{-1}}\). A particle of the medium oscillates vertically. Which graph of vertical displacement \(y\) against time \(t\) best represents the motion of this particle?

1. AGraph A: y/mm against t/s, amplitude +1.0 to -1.0, period 0.20 s
2. BGraph B: y/mm against t/s, amplitude +1.0 to -1.0, period 4.0 s
3. CGraph C: y/mm against t/s, amplitude 0 to +2.0, period 4.0 s
4. DGraph D: y/mm against t/s, amplitude 0 to +2.0, period 5.0 s

As printed in the paper