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# A 22 g bullet traveling 210 m/s penetrates a 2.0 kg block of wood and emerges going 150 m/s.

A 22 g bullet traveling 210 m/s penetrates a 2.0 kg block of wood and emerges going 150 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?