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On a frictionless horizontal air table, puck A (with mass 0.253kg ) is moving toward puck B (with mass 0.365kg), which is initially at rest. After the collision, puck A has velocity 0.115m/s to the left, and puck B has velocity 0.655m/s to the right. Q1-What was the speed of puck A before the collision? Q2-Calculate , the change in the total kinetic energy of the system that occurs during the collision.

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