Question

A body is executing the simple harmonic motion with an angular frequency of 2rad/sec. Velocity of the body at 20m displacement, when amplitude of motion is 60m, is ___________

(a) 90 m/s

(b) 118 m/s

(c) 113 m/s

(d) 131 m/s

I had been asked this question by my college professor while I was bunking the class.

My question is based upon Wave Motion topic in division Waves of Engineering Physics I

Answer 1

Correct option is (c) 113 m/s

For explanation: v=ω√(A^2-y^2)=2√(60^2-20^2)

v=80√2

v=113m/s.