* Angular velocity measures how fast an object is rotating. Uniform angular velocity means it rotates at a constant rate.

* Angular acceleration measures the rate of change of angular velocity.

While uniform angular velocity implies the magnitude of the angular velocity is constant, it doesn't say anything about the direction of the rotation.

Examples:

* Circular motion: An object moving in a circle at a constant speed has uniform angular velocity. However, it still experiences centripetal acceleration, which is directed towards the center of the circle. This acceleration is necessary to keep the object moving in a circular path.

* Rotating platform: Imagine a platform rotating at a constant speed. Even though the platform's angular velocity is uniform, any point on the platform experiences a changing velocity vector (due to the constantly changing direction). This change in velocity results in angular acceleration.

In summary: Uniform angular velocity means the magnitude of rotation is constant, but the object can still experience acceleration due to changes in the direction of rotation.