1. The problem statement, all variables and given/known data Two hockey pucks approach each other as shown in the figure below. Puck 1 has an initial speed of 21 m/s, and puck 2 has an initial speed of 14 m/s. They collide and stick together. 2. Relevant equations 3. The attempt at a solution The pucks didn't have a mass so I couldn't use the components.