Bearing Slide

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How fast does the dead bear slide after being hit?

A polar bear of mass 999.9 kg lies sleeping on a horizontal sheet of ice. A hungry hunter fires into him a 0.1 kg bullet moving horizontally with a speed of 100m/s. How fast does the dead bear slide after being hit?
I would appreciate the help of how to do the problem and not just the answer, thank you!

Momentum before = momentum after
(999.9)(0) + (0.1)(100) = (1000)V => 0.01 m/s

NOTE:The speed of the bullet is unrealistically slow.

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