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A bullet flies through the air, passes through a paperback book, and then continues to fly...

A bullet flies through the air, passes through a paperback book, and then continues to fly through the air beyond the book. When is there a force? When is there energy?

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Answer #1

When bullet is passing through the book there will be force opposite to its velocity and reduces its velocity.

When bullet is in motion always it will have energy which is kinetic energy.

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