Question

in which case the average velocity of a body is zero​

Answer 1

when the body is not moving, then it's average velocity is 0

Answer 2

Explanation:-

*If a body starts its motion from a point and comes back to the same point after some time, the displacement is zero. So the average velocity is also zero.

    Average velocity = Displacement / Time

*After on round in a circular path the average velocity is zero.