Question

A stationary u,ave is represented by y = A sin (100t) cos (0.01x) where y and A are in in millimetres. t is in seconds and x is in metres. The velocity of the wave is

(a) 104 m/*

(b) not derivable

(c) 1 m/*

(d) 102 m/*.

Answer 1

Correct option (a) 104 m/s

Explanation:

y = A sin (100 t) cos (0.01 x).

Comparing it with standard equation