1. The problem statement, all variables and given/known data A uniform 4.5 kg square solid wooden gate 1.5 m on each side hangs vertically from a frictionless pivot at the center of its upper edge. A 1.1 kg raven flying horizontally at 5.0 m/s flies into this gate at its center and bounces back at 2.0 m/s in the opposite direction. What is the angular speed of the gate just after it is struck by the unfortunate event. 2. Relevant equations L=mvl and L=Iw 3. The attempt at a solution First I calculated the momentum for the bird using L=mvl L = (1.1 kg)(5.0 m/s)(1.5m/2) = 4.125 kg m/s^2 Then the total momentum after it strikes the square L(total) = raven + the square I wasn't sure about the moment of interia equation for the square so I used the one a thin rectangular plate axis along edge = Mr^2/3 = (1.1kg)(-2.0 m/s)(1.5m/s) + (4.5 kg)(.75)^2/3(wf) = -1.65 kg m/s^2 + 0.84375(wf) I equated this to the intial momentum of the bird 4.125 kg m/s^2 = = -1.65 kg m/s^2 + 0.84375(wf) wf = 6.8 rad/s which is way off Answer = 1.71 rad/s I think I'm having trouble as I can't visual the scenario properly...and help would be great!