On a frictionless, horizontal air table, puck AA (with mass 0.250 kgkg) is moving toward puck BB (with mass 0.350 kgkg), which is initially at rest. After the collision, puck AA has a velocity of 0.120 m/sm/s to the left, and puck BB has a velocity of 0.610 m/sm/s to the right.

Part A

Part complete

What was the speed of puck AA before the collision?

Express your answer in meters per second.

vv =

0.734

m/sm/s

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Part B

Calculate the change in the total kinetic energy of the system that occurs during the collision.

Express your answer in joules.

KK =

JJ

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