Calculate delta K, the change in the total kinetic energy of the system that occurs during the collision.

On a frictionless horizontal air table, puck A (with mass 0.253 kg ) is moving toward puck B (with mass 0.366 kg ), which is initially at rest. After the collision, puck A has velocity 0.121 m/s to the left, and puck B has velocity 0.654 m/s to the right