1. The problem statement, all variables and given/known data A 0.321 kg puck, initially at rest on a horizon- tal, frictionless surface, is struck by a 0.227 kg puck moving initially along the x axis with a speed of 2.51 m/s. After the collision, the 0.227 kg puck has a speed of 1.51 m/s at an angle of 31 degrees to the positive x axis. Determine the velocity of the 0.321 kg puck after the collision. Answer in units of m/s. 2. Relevant equations Final Momentum in the x direction=Original Momentum in the x direction 3. The attempt at a solution I do not understand collisions at all. My teacher didn't go over this and reading about this online is confusing the hell out of me, especially since I can't find an example of hitting something at rest and going off at an angle online so I have no idea how I'm supposed to solve this.