Question

why acceleration is zero while velocity is max at mean position

Answer 1

Answer:

it is for simple harmonic motion..

take a simple pendulum as the example.

if we observe at the lowest point acceleration supporting the motion is 0 while velocity is maximum..

the acceleration after the mean point is to reduce the speed so that it comes to a stop

Explanation:

Answer 2

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This is reason Since acceleration is the change in velocity over time, there has to be a change in velocity for something to accelerate. In other words, if something is accelerating, it has to have a variable velocity. If the velocity is constant however, the acceleration is zero (because the velocity isn't changing over time).