RPM is measured by "rotations per minute," while RCF is "relative centrifugal force." RPM signifies the number of revolutions a rotating object completes per minute while the RCF denotes the force applied on an object in a rotating environment.
The RCF is calculated using the RPM and the radius. RPM is an annotation by which a manufacturer of a rotating machine describes it's rotational speed. In linear motion, the velocity of an object is denoted by its RPM. RCF is calculated in terms of gravity multiplied by force. Centrifugal force represents the outcome of inertia, which arises about the rotation.