A bob of mass M is suspended by a massless string of length L. The horizontal velocity π£ at position A is just sufficient to make it reach the point B. The angle π at which the speed of the bob is half of that at A, satisfies

Question : A bob of mass M is suspended by a massless string of length L. The horizontal velocity π£ at position A is just sufficient to make it reach the point B. The angle π at which the speed of the bob is half of that at A, satisfies