* Velocity is a measure of how fast an object is moving and in what direction.

* Acceleration is the rate of change of velocity. This means acceleration can occur in two ways:

* Changing speed: The object is speeding up or slowing down.

* Changing direction: The object is moving in a curved path even if its speed is constant.

Example:

Imagine a ball thrown straight up into the air. At the very top of its trajectory, for a brief moment, the ball's velocity is zero. It's stopped moving upwards. However, gravity is still acting on the ball, causing it to accelerate downwards.

Therefore, a body can have zero velocity (instantaneously) while still experiencing acceleration.