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The Centripetal force is the force which keeps the body move along the axis of rotation and this force is acting always towards the center.
Hi @yadu123 ,
Suppose you take a stone and tie it with a thread at one end. Now holding the other end you start rotating the stone in a circular fashion. In this situation the stone is held by the thread/string and the string always tries the stone to pull it towards your hand. this force is technically called as the centripetal force. Now you may ask that is a physical contact always needed for centripetal force to act??
The answer is NO !
Another example is the case in which earth revolves around the sun. Here also the gravitational force between sun and earth acts as the centripetal force.