* Velocity is about how fast an object is moving and in what direction. Zero velocity means the object is stationary.

* Acceleration is about how the velocity is changing.

Example:

Imagine a ball thrown straight up into the air.

* At the very peak of its flight, the ball momentarily stops moving (zero velocity).

* However, at that instant, gravity is still acting on it, pulling it back down. This means its velocity is *changing*, and therefore the ball is still experiencing acceleration.

In summary:

* Zero velocity means the object is not moving at that instant.

* Acceleration means the object's velocity is changing.

It's perfectly possible for an object to be at rest (zero velocity) but still have a changing velocity (acceleration).