If object A and object B collide. Object A is going horizontally while object B is going up-diagonally. We find the momentum of object A to be 10 kg m/s while the momentum of B is 20 kgm/s. Does that mean that in the entire system after the collision there will have to be 10 kg m/s horizontally and 20 kgm/s up and diagonally or can there be lets say 15 horizontally and 15 up diagonally? I hope it's not confusing, sorry if it is.