Ok, I have a general question about centrifugal force. Lets say I have an object who moves in a circular path, we know the object is accelerating because the velocity is constantly changing direction, the acceleration is towards the center. Now, where does the centrifugal force comes to play? Is it equal to f = m*w^2*R = m*v^2/r ? Does it comes from newton 3rd low to the centripetal force? 10x in advance.