1. The problem statement, all variables and given/known data A thin rod of mass M and length L rests on a frictionless table and is struck L/4 from its CM by a clay ball of mass m moving at speed v. The ball sticks to the rod. Determine the translational and rotational motion 2. Relevant equations Irod=1/12 mr^2 Irod=1/3 mr^2 L=mrv=Iw 3. The attempt at a solution I fount out the translational velocity, used the conservation of linear momentum. But I'm kind of stop in the second part. I found out: m(1/4 l)v=Iw but what is I? I guess perhaps we needs to find out the new center of mass, is it (1/12 Ml^2)+(mr^2) where r is calculated with the new center of mass? Is it(m 1/4 l)/(M+m)? And again which Irod should I use? thank you for help.