The uniform pole has a mass of 15 kg and falls from rest when θ = 90°. It strikes the ed...

The uniform pole has a mass of 15 kg and falls from rest when θ = 90°. It strikes the edge at A when θ = 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.