On a frictionless horizontal air table, puck A (with mass 0.253 kg ) is moving toward puck B (with mass 0.367 kg ), which is initially at rest. After the collision, puck A has velocity 0.124 m /s to the left, and puck B has velocity 0.645 m/s to the right. Part A What was the speed vai of puck A before the collision? View Available Hint(s) AEd ? VAi = m/s Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining Part B Calculate AK, the change in the total kinetic energy of the system that occurs during the collision. View Available Hint(s) O ? AK = Submit