1. The problem statement, all variables and given/known data Two masses M each are connected by a rigid rod of negligible mass having length a.The CM of the system is stationary in a gravity free space and the system rotates about the CM. with angular velocity w.One of the rotating masses strikes a third stationary ball of mass M which sticks to it.What is the angular momentum of the three mass system before and after collision? 2. Relevant equations 3. The attempt at a solution For the collision conservation of linear momentum will be applicable. Mv=2Mv' or,v'=v/2=wa/4. From this w' can be calculated. Prior collision,L=Iw where I is the MI of the two mass system. After collision, L'=I'w' Please check if I am correct.