CBSE Class 11-science Answered

When acceleration is zero then velocity of object can be zero or constant. The body continues to move with its velocity throughout. For e.g if a train is at rest then acceleration is zero and velocity remains zero. But when train moves with uniform velocity then also acceleration is zero and velocity remains constant.

When velocity is zero, acceleration can be either zero or non zero. A standing train is an example of zero velocity with zero acceleration. However acceleration can also be non zero. Consider a ball thrown upwards. The ball experiences acceleration due to gravity at all time, but at highest point its velocity becomes zero.

Hence a ball at its highest position is an example of zero velocity and non zero acceleration.