On a frictionless, horizontal air table, puck A (with mass 0.250 kilogram) is moving toward puck B (with mass 0.350 kilogram), which is initially at rest. After the collision, puck A has a velocity of 0.120 m/s to the left, and puck B has a velocity of 0.660 m/s to the right.
(a) Find what was the speed of puck A before the collision?
m/s
(b) Determine the change in the total kinetic energy of the system that occurs during the collision.
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