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The average force necessary to stop a bu...

The average force necessary to stop a bullet of mass 20 g and `250 m//s` as it penetrates wood to a distance of 12 cm, is:

A

`5.2 xx 10^3 N`

B

`4.2 xx 10^3 N`

C

`3.2 xx 10^3 N`

D

`2.2 xx 10^3 N`

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