On a frictionless, horizontal air table, puck A (with mass 0.250 kg) is moving toward puck B (with mass 0.350 kg), which is initially at rest. After the collision, puck A has a velocity of 0.120m/s to the left, and puck B has a velocity ofO.650m/s to the right.
(a) What was the speed of puck A before the collision?
(b) Calculate the change in the total kinetic energy of the system that occurs during the collision.