The string is L = 1m long. Peg P is located d below the support point. When the ball is released from rest (as shown), it swings along the dashed path. WHen it catches on the peg, it swings upward but does not complete a circular path. Instead it leaves its path and strikes the peg. Part A. What is the distance d below the support point at which the peg can be placed for this to occur? Part B. If the Peg P is now located at an angle A below the horizontal (as in the picture). When the string catches on the peg, the ball strikes the peg. Express d as a function of A if this were to occur. I'm thinking of approaching it by applying the law of conservation of energy and figuring the energy and velocity at various points, and get a relation in terms of energy. So far, I'm not getting anywhere useful. Can anyone please help (and explain?) thanks .