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# The expanding gases that leave the muzzle of a rifle also

ISBN: 9780321675460 31

## Solution for problem 17E Chapter 8

University Physics | 13th Edition

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Problem 17E

The expanding gases that leave the muzzle of a rifle also contribute to the recoil. A .30-caliber bullet has mass 0.00720 kg and a speed of 601 m/s relative to the muzzle when fired from a rifle that has mass 2.80 kg. The loosely held rifle recoils at a speed of 1.85 m/s relative to the earth. Find the momentum of the propellant gases in a coordinate system attached to the earth as they leave the muzzle of the rifle.

Step-by-Step Solution:

Solution 17E Step 1 of 1: Here the system is rifle, bullet and propellant gases. The system is conserved because before the rifle is fired everything in the system is at rest so initial momentum of the system is zero. Consider the motion of the bullet is +x direction and the bullet speed is 601 m/s 1.85 m/s = 599 m/s relative to earth, The...

Step 2 of 3

Step 3 of 3

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The expanding gases that leave the muzzle of a rifle also

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