Physics

Problem

The speed of propagation of a wave in a medium is 300 m/s. The equation of motion of point at

x = 0

is given by

y = 0.04 \sin 600 \pi t

(metre). The displacement of a point

x = 75

cm at

t = 0.01

s is a. 0.02 m b. 0.04 m c. zero d. 0.028 m