Ever wondered why a ball flies outward in a rotating merry-go-round? As the merry-go-round rotates, the ball traces a circular path. The component of the tension force in the string provides the necessary centripetal force for the circular motion of the ball. The centripetal force is directed toward the center of the circle and is denoted by the product of the object's mass, the square of its angular velocity, and its distance from the axis of rotation. Since the ball flies outward, it follows from Newton's third law that the inward centripetal force should have an equal and opposite outward reaction force. This outward force directed away from the center of rotation is called the centrifugal force. The rotating ball in the merry-go-round experiences a centrifugal force that pushes it outward away from the center of rotation. Centrifugal force is a pseudo force. It is considered only when the frame of observation is non-inertial.