4 Part A On a frictionless horizontal air table, puck A (with mass 0.245 kg) is moving toward puck B (with mass 0.373 kg), which is initially at rest. After the collision, puck A has velocity 0.120 m/s to the left, and puck B has velocity 0.653 m/s to the right. What was the speed vi of puck A before the collision? View Available Hint(s) VAi Submit Part B ? m/s Calculate AK, the change in the total kinetic energy of the system that occurs during the collision. View Available Hint(s) AK = Submit ? J