Circular motion is the movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation, or non-uniform, with a changing rate of rotation.

• Uniform Circular Motion: The speed of the object is constant, but its velocity is not because the direction is constantly changing. This change in velocity means the object is accelerating, and the acceleration is directed towards the center of the circle (centripetal acceleration).
• Non-Uniform Circular Motion: Both the speed and direction of the object change. This means there is both centripetal acceleration (towards the center) and tangential acceleration (along the direction of motion).

Circular motion is fundamental to many physical phenomena, from the orbits of planets to the movement of particles in an atom.