Physics

Problem

A travelling wave on a stretched string is represented by

y=0.04\sin(8\pi x-40\pi t)

, where

x

and

y

are in metres and

t

in seconds. Calculate the speed of the wave. a)

10\,\text{m s}^{-1}

5\,\text{m s}^{-1}

2.5\,\text{m s}^{-1}

15.7\,\text{m s}^{-1}