That force by the help of which a body when rotating in circular path maintain it's path to move in circular path .. that force is called Centripedal Force.

It's direction is always orthogonal.
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Let us consider a body moving in a circular motion . According to Newton's 1st law of motion , the body is  expected to move in Tangential path but that  will not happen due to  Centripetal Acceleration . The body is kept in  the circular path i.e velocity is different at different point .  Therefore the body is said to be accelerated. And the force that is executing the acceleration is called  Centripetal force.
Centripetal force is a  type of acceleration which makes body to move in circular path .      
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