Physics

A bullet with a mass of 28 g is fired from a 2.8-kg gun that is stationary, but free to recoil. After the bullet is fired, the gun is observed to be moving at 1.4 m/s [left]. What is the velocity of the
bullet?

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2. 👎
3. 👁
1. let left be negative.

initial (before shooting, momentum was zero, so after shooting, the sum of the bullet and gun momentum has to be zero
28*V +2800*(-1.4)=0
solve for V

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2. 👎
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bobpursley

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