* Acceleration is a change in velocity. Velocity is a combination of speed and direction. So, an object can be stationary (not moving) and have zero velocity, which means it also has zero acceleration.

* Newton's First Law of Motion: This law states that an object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity unless acted upon by an unbalanced force. If no force is acting on the object, its velocity won't change, and it will have zero acceleration.

Examples:

* A book sitting on a table.

* A car parked in a driveway.

* A ball at the top of its trajectory after being thrown vertically upwards.

Important Note: It's possible for an object to have constant velocity and zero acceleration. This means the object is moving at a steady speed in a straight line, without changing direction.