A 20-g bullet moving at 1000 m/s is fired through a one-kg block of wood emerging at a speed of 200 m/s. What is the change in the kinetic energy of the bullet-block system as a result of the collision assuming the block is free to move?
A) "0 J"
B) "-9.5 kJ"
C) "9.5 kJ"
D) "-18 J"

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The Answer of A 20-g bullet moving at 1000 m/s is fired through a one-kg block of wood emerging at a speed of 200 m/s. What is the change in the kinetic energy of the bullet-block system as a result of the collision assuming the block is free to move?
A) "0 J"
B) "-9.5 kJ"
C) "9.5 kJ"
D) "-18 J"

A 20-G Bullet Moving at 1000 M/s Is Fired Through