Question

Under what conditions velocity of the body is zero but acceleration is non zero

Answer 1

a = v-u/t

therefore, if velocity of body is 0, it means that, it is in rest. so, for acc. to be non-zero, the body's initial velocity must be non zero, and there should have been -ve acceleration for reducing its v to 0(put it from motion to rest). tus when u is non zero and v is zero, acc. comes to be in negative, and thus non zero.