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

question 85

Multiple Choice

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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Definitions:

Conditioned Response

the learned reaction to a conditioned stimulus that occurs as a result of previous conditioning.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without any need for learning or prior conditioning.

Habituation

A decrease in responsiveness to a specific stimulus as a result of repeated experience with it.