Question

The phase difference between displacement and acceleration of a particle in a simple harmonic motion is :

(1) zero

(2) π rad

(3) 3π/2 rad

(4) π/2 rad

Answer 1

Correct answer is

π rad

Let X=Asin(ωt)
so, a=−Aω2sin(ωt)=Aω2sin(π+ωt)
so, clearly phase difference is π