The beam having a weight of 150 lb is supported by two cables. If the cable at end B is cut so that the beam is released from rest when  = 30°, determine the speed at which end A 

The beam having a weight of 150 lb is supported by two cables. If the cable at end B is cut so that the beam is released from rest when  = 30°, determine the speed at which end A strikes the wall. Neglect friction at B. Consider the beam to be a thin rod.