Topic: centripetal force and centrifugal force

centripetal force and centrifugal force action-reaction force pair associated with circular motion . According to Newton's first law of motion, a moving body travels along a straight path with constant speed (i.e., has constant velocity ) unless it is acted on by an outside force . For circular motion to occur there must be a constant force acting on a body, pushing it toward the center of the circular path. This force is the centripetal ( "center-seeking" ) force. For a planet orbiting the sun, the force is gravitational; for an object twirled on a string, the force is mechanical;... Read more