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Formula Circular motion Angular velocity    Radius    Mass

Formula: Circular motion
Centripetal force perpendicular to angular velocity
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Centripetal force

Centripetal force (also called radial force) is a force acting on a body rotating in a circle (towards the center of the circle). This force keeps the body on the circular orbit. It is always perpendicular to the angular velocity \(\omega\) in a uniform circular motion.

Angular velocity

Angular velocity indicates which angle is traveled by the body per second. If \(\omega\) is doubled, then the centripetal force \( F_{\text z} \) is quadrupled.


Radius of the circular trajectory. If the radius is doubled (at constant angular velocity), then the centripetal force is also doubled.


Mass of the body moving on the circular path. Heavier bodies require a larger centripetal force to keep them on the circular path with a certain radius.