1. The problem statement, all variables and given/known data Two vehicles traveling as shown collide at an intersection and lock together. Car A ha sa mass of 1000 kg and was traveling east at 40 m/s. Car B has an unknown mass and was headed south at 15 m/s. If the wreckage skids exactly southeast just after the collision, then what is the mass of Car B. Also, what was the initial speed of the wreckage? 2. Relevant equations p=mv Pti = Ptf 3. The attempt at a solution The thing that is throwing me off with this question is the fact that Car B is of unknown mass. I tried to do trigonometry using the two vectors given, 4000 kg(m/s) [E] and (x)(15 m/s) , but I couldn't seem to work out an answer.