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On a frictionless horizontal air table, puck A (with mass 0.255 kg ) is moving toward...

On a frictionless horizontal air table, puck A (with mass 0.255 kg ) is moving toward puck B (with mass 0.375 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 0.653 m/s to the right.

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

b) Calculate ΔK, the change in the total kinetic energy of the system that occurs during the collision.

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Answer #1

Use momentum conservation principle to find the speed of puck A before collision and hence find the change in total kinetic energy as shown below

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