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DrDonaldDuck

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## Homework Statement

"A bullet is fired through a 5.0 cm thick board of some material. The bullet strikes the board with a speed of 200 m/s, and emerges out the other end at 100 m/s.

## Homework Equations

a= (change in velocity)/(change in time)

average velocity = .5(initial v + final v)

## The Attempt at a Solution

a= (-100 m/s)/(.000333 seconds) = -300300 m/s^2

I found .000333s as the time it took for the bullet to pass through the board, using the average velocity of 150 m/s.

Is this correct?

SOLVED.

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