(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 7.45g bullet has vi = 353 m/s. It strikes the 0.725 block of a ballistic pendulum and passes completely through the block. If the block rises through a distance h = 12.1 cm, what was the velocity of the bullet as it emerged from the block?

2. Relevant equations

Energy conservation and momentum

3. The attempt at a solution

First I solved for the velocity of the block when the bullet hit it. I used conservation of energy 1/2mv2 = mgh. I got the velocity as 2.41 m/s. Then I used conservation of momentum.

.00745(353)=.725(2.41) + .00745vf.

I solved for vf and got 118.5 m/s. The answer is supposed to be 203 m/s. I have tried combining the masses with the 2.41 velocity, but it still doesn't work out.

Can some one help me out? Thanks.

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# Homework Help: Momentum of a bullet problem

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