# Is centripetal and centrifugal force an action reaction pair?

## Question:

Is centripetal and centrifugal force an action reaction pair?

## Centripetal Force vs Centrifugal Force

Centripetal force is the force experience by an object going on a uniform circular motion which is always directed to the center of the circular motion. Centrifugal force is considered to be a fictitious force which only arise due to the inertial force acting outward the rotation only if viewed in a rotational frame of reference. This is the reason why you feel push on wall of a rotating wall even if the centripetal force is pulling you inward.

According to Newton's 3rd law of motion: for every action there is an equal and opposite reaction. This is know as the action reaction pair of force. We need to take note that Newton's law of motion only applies to inertial frame of reference. Thus, if that is the case only the centripetal force exists however if we view it in a rotational frame of reference, a centrifugal force exists to counteract the centripetal force. If the two quantity is equal then the object can move in a circular path. Since centrifugal force does not really exists in a inertial frame of reference then it is not an action reaction pair with centripetal force.