A uniform thin disk of 6-in. diameter is attached to the end of a rod AB of

Question:

A uniform thin disk of 6-in. diameter is attached to the end of a rod AB of negligible mass which is supported by a ball-and-socket joint at point A, knowing that the disk is observed to process about the vertical axis AC at the constant rate of 36 rpm in the sense indicated and that its axis of symmetry AB forms s an angle β = 60? with AC, determine the rate at which the disk spins about rod AB.