Question:
A string of length $20 \mathrm{~cm}$ and linear mass density $0.40 \mathrm{~g} / \mathrm{cm}$ is fixed at both ends and is kept under a tension of $16 \mathrm{~N}$. A wave pulse is produced at $t=0$ near an end as shown in figure. Which travels towards the other end.
(a) When will the string have the shape shown in the figure again?
(b) Sketch the shape of the string at a time half that found in part (a)
Solution:
