A transverse disturbance on a string is described at by (with in metres)

PHYSICS · Subjective · CBSE · Physics · Waves · Waves

Problem

A transverse disturbance on a string is described at

t = 0\,\text{s}

y = 0.03\,\sin(4\pi x)\,\text{m}

(with

x

in metres). After

0.25\,\text{s}

the waveform is observed to be

y = 0.03\,\sin(4\pi x - \pi)\,\text{m}

. (i) State the direction in which the wave is propagating. (ii) Calculate the speed of the wave.