Question

Figure (15-E1) shows a wave pulse at t = 0. The pulse moves to the right with a speed of 10 cm s⁻¹. Sketch the shape of the string at t = 1 s, 2 s and 3 s.

Answer 1

Given,
Wave pulse at t = 0

Wave speed = 10 cms⁻¹
Using the formula $s=v\times t$, we get:

$$\begin{gathered} \mathrm{At}: \\ t=1\mathrm{s},s_1=\nu \times t=10\times 1=10\mathrm{cm} \\ t=2\mathrm{s},s_2=\nu \times t=10\times 2=20\mathrm{cm} \\ t=3\mathrm{s},s_3=\nu \times t=10\times 3=30\mathrm{cm} \end{gathered}$$