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On a frictionless, horizontal air table, puck A (with mass 0.250 kg ) is moving toward...

On a frictionless, horizontal air table, puck A (with mass 0.250 kg ) is moving toward puck B (with mass 0.360 kg ), that is initially at rest. After the collision, puck A has a velocity of 0.118 m/s to the left, and puck B has velocity 0.655 m/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.

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