Question

Can you explain the case when acceleration is constatnt and velocity is changing ?

Answer 1

when velocity is changing, obviously there is acceleration. but in case of circular motion, since the body returns to its initial position, there is change in velocity but no acceleration

Answer 2

When a body falls freely due to gravity then it has a constant acceleration of g (g=acceleration due to gravity) but its velocity always changes according to the equation .---. v=(2gh)1/2 case- when a body performs clyclic motion, then its acceleration is constant i.e.centripetal accleration but its velocity always changes as direction of velocity always changes (velocity in any point of the circle works in the direction of the tangent at that point).