On a frictionless horizontal air table, puck A ( with mass 0: 252 kg is moving towards puck Blwith maps 0 : 373 kg) . which is initially at nest. After collision, Puck A has velocity 0-121 mils to the left, and puck B has velocity :646m/s to the right. @What was the speed VAi of puck A before collision ( Calculate AK, the change in the total kinetic energy of the system that occurs during the collision