A 10-G Bullet Moving 1000 M/s Strikes and Passes Through

Multiple Choice

A 10-g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest,as shown.The bullet emerges from the block with a speed of 400 m/s.To what maximum height will the block rise above its initial position?
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A) 78 cm
B) 66 cm
C) 56 cm
D) 46 cm
E) 37 cm