Just want to make sure my concepts about this fictitious force is correct... " Assuming Joe is spinning around on a stationary point, while holding a string tightened onto stone. Therefore, he is providing a centripetal force to the stone through the string, so that it rotates around him. Suddenly Joe decides to release the string. As a result, the stone flies out in the tangential direction to its orbit at that instant. However, since he is still spinning, the stone appears to to be flying out in a direction perpendicular to its actual one. Hence, a centrifugal force appears to be acting on the stone. Is the above description correct?