1. The problem statement, all variables and given/known data: I just have a quick question about direction of velocity in solving for energy conservation problems. Since energy has no direction, do different angles ever affect the outcome? Like say in a collision where a truck hits three other vehicles and sends all three in different directions. The resulting velocity on each would be lower since it has direction (i.e., v*cos(45)), would it not? And so, how can energy conservation account for this? I apologize if this is a very basic question. I'm just curious. 2. Relevant equations: Conservation of Energy: KE + PE = KE + PE 3. The attempt at a solution: Since this is more of a conceptual question, I don't really have an attempt.