A body slips down a chute which is in the form of a loop as in fig. It starts from the lowest admissible height, and follows the loop without falling. In doing this, it does not exert any pressure on the loop at the highest point of its path. On what body is centrifugal force acting at this moment.
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Sol. Since the centripetal force at the upper part of the loop is that which pulls the body towards the earth, the centrifugal force is that with which the earth is pulled towards the body, i.e., it acts on the earth.
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