Question

What is the phase difference between velocity and acceleration in shm

Answer 1

Displacement in SHM is given by x = A sin( wt) where A is amplitude, w is angular velocity, t is instantaneous time. Phase difference between sin and cos function is 90 degrees or pi/2 radians . Hence phase difference between displacement and velocity is 90 degrees or pi/2 radians.
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Answer 2

answer will be π/2 radian