1. The problem statement, all variables and given/known data how can the total momentum of an exploding cart still be zero after the collision if they are both moving? The momentum of cart one before the explosion was zero and so was the momentum of cart two before the explosion. The momentum of cart one after the explosion was 137.67 and the momentum of cart two after was 54.14. 2. Relevant equations p=mv 3. The attempt at a solution I thought that there might be something to do with them both being at rest before the explosion and maybe also that they are going in separate directions but I am not one hundred percent sure.