A travelling wave on a stretched string is represented by

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

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}

(b)

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

(c)

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

(d)

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