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On a frictionless horizontal air table, puck A (with mass 0.252 kg ) is moving toward...

On a frictionless horizontal air table, puck A (with mass 0.252 kg ) is moving toward puck B (with mass 0.368 kg), which is initially at rest. After the collision, puck A has velocity 0.121 m/s to the left, and puck B has velocity 0.651 m/s to the right.

What was the speed vAi of puck A before the collision?

= 0.830 m/s

Calculate  ?K, the change in total kinetic energy of the system that occurs in the collision.

= ?

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