Question

Why in S.H.M the acceleration is zero when velocity is greater​

Answer 1

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When the displacement is maximum, the acceleration is maximum, because the spring applies maximum force; the force applied by the spring is in the opposite direction as the displacement.

Answer 2

Answer :

In simple harmonic motion (S.H.M.) the acceleration of a body is directly proportional to the displacement . Therefore, it is zero when it is at equilibrium position i.e velocity is maximum at that position. Hence, the acceleration is zero at the equilibrium position when the velocity is greatest .

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