1. The problem statement, all variables and given/known data Suppose A ball of mass m moving with a speed v collides with a rod of mass M and length L placed horizontally on a smooth floor. The coefficient of restitution is 0.5. 2. Relevant equations 3. The attempt at a solution In this case how do we utilise the information of COR. If it were given COR is 1 then we could conserve kinetic energy. But in this case how do we how about it?