The two pucks collide on an air hockey table. Puck A consists of a mass of 28 g and is primarily traveling in the + x direction at 7.8 m/s. Puck B consists of a mass of 112 g and is primarily at rest. After the pucks collide, puck A moves away at an angle of 45 above the + x-axis, whereas puck B travels at an angle of 42 beneath the + x-axis.
Compute puck A's final speed and puck B's final speed. As well, what fraction of kinetic energy was lost in the collision?