In circular motion, the acceleration present is called centripetal acceleration. It is directed toward the center of the circle and is responsible for continuously changing the direction of the object's velocity, keeping it moving in a circular path. The magnitude of the centripetal acceleration can be calculated using the formula:
a = v^2 / r
where "a" is the centripetal acceleration, "v" is the instantaneous tangential velocity of the object, and "r" is the radius of the circular path.
In terms of uniform or non-uniform acceleration, the centripetal acceleration in circular motion is considered to be uniform. This means that the magnitude of the acceleration remains constant throughout the motion, while only the direction changes. The tangential velocity, on the other hand, can vary depending on the object's position within the circular path, but the centripetal acceleration itself is uniform.