Question

A particle is executing simple harmonic motion of amplitude 10cm. Its time period of oscillation is π seconds. The velocity of the particle when it is 2 cm from extreme position is ___________

(a) 10 cm/s

(b) 12 cm/s

(c) 16√16 cm/s

(d) 16 cm/s

I had been asked this question in an online interview.

My doubt stems from Wave Motion in portion Waves of Engineering Physics I

Answer 1

Correct choice is (b) 12 cm/s

The explanation is: v=2π/T×√(A^2-y^2)

v=2π/π √(10^2-8^2)

=2×6=12cm/s.