Yep. That was it; wrong sign in the coefficient of restitution equations (and no I was not assuming a negative coefficient of restitution)
And just to clarify, yes the rod is pinned in the center.
Thank you so much for your help and time.
Lee
Here is my problem.
A rod spinning about it's cg of angular speed omega. So there is no linear momentum, I believe that's correct. Just angular momentum. A ball, v_i = 0, impact the rod at radius, r. The coefficient of restitution is e. How do I use this to find the final velocity of...