providing centripetal force
centripetal force is not a special force or a new kind of force.One of the known forces provides the centripetal force for the object to move in a circular path. For example, when a mass attached to a string is whirled, the tension in the string provide the centripetal force. For a car moving on a circular track, the centripetal force is provided by the sideways frictional force between the tyres and the wheels as shown.