The uniform pole has a mass of 15 kg and falls from rest when  = 90° until it strikes the edge at A,  = 60°. If the pole then begins to pivot about

The uniform pole has a mass of 15 kg and falls from rest when  = 90° until it strikes the edge at A,  = 60°. If the pole then begins to pivot about this point after contact, determine the pole's angular velocity just after the impact. Assume that the pole does not slip at B as it falls until it strikes A.