Conservation of momentum does not hold true? 1. The problem statement, all variables and given/known data Here is the problem. State 2 is shown in the picture, it is right before impact. State 3 is after impact. I used conservation of momentum of the entire system (rod and table. However as you can see it shows us that the rod has the same momentum before and after the impact. This is impossible because e=0.6. Why is it that my conservation equation does not hold?