A force, arising from the body's inertia, which appears to act on a body moving in a circular path and is directed away from the centre around which the body A fictitious force, also called a pseudo force is an apparent force that acts on all masses whose motion is described using a non-inertial frame of reference, such as a rotating reference frame.
Centrifugal force is a pseudo force because it acts only in a non inertial frame of reference i.e. a frame which is accelerating with respect to the ground.
Centrifugal force exists only in a non inertial frame and centripetal force exists only in an inertial frame. Thus, centrifugal and centripetal force never exist together.
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