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Homework Help: Expanding gases leaving a muzzle

  1. Jun 21, 2012 #1
    1. The problem statement, all variables and given/known data
    The expanding gases that leave the muzzle of a rifle also contribute to the recoil. A .30 caliber bullet has mass 0.0072kg and a speed 0f 601 m/s relative to the muzzle when fired from a rifle that has mass 2.8 kg. The loosely held rifle recoils at a speed of 1.85 m/s relative to the earth. Find the momemtum of the propellant gases in a coordinate system attached to the earth as they leave the muzzle of the rifle.
  2. jcsd
  3. Jun 21, 2012 #2
    Have you attempted the question?
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