The way in which the displacement $y$ of a transverse wave on a rope varies with distance $x$ is shown at time $t = 0$. The wave has frequency $0.5\,\text{Hz}$. A point P on the rope is labelled. The diagram shows P in its initial position and also four possible new positions. What is the position of P at time $t = 1\,\text{s}$?
Physics 9702 · AS & A Level · Progressive waves