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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A body is allowed to slide down a frictionless track freely under gravity. The track end in a semicircular shaped part of a diameter O. The height (minimum) from which the body must fall so that it completes the circle ?

A body is allowed to slide down a frictionless track freely under gravity. The track end in a semicircular shaped part of a diameter O. The height (minimum) from which the body must fall so that it completes the circle ?

If the normal force is doubled is the coefficient of friction