* Acceleration is a change in velocity. Velocity has two components: speed and direction.
* Changing direction means changing velocity. Even if the object's speed remains the same, its direction is constantly changing as it moves in a circle.
* This change in velocity results in acceleration. This acceleration is called centripetal acceleration and it is always directed towards the center of the circle.
Think of it this way: if an object were to suddenly stop accelerating in a circle, it would fly off in a straight line tangent to the circle. The centripetal acceleration is what keeps the object moving in its circular path.