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Homework Help: Kinetic Energy of a bullet

  1. Feb 27, 2008 #1
    1. The problem statement, all variables and given/known data
    When a gun fires a bullet why is the kinetic energy gained by the bullet much greater than the kinetic energy gained by the gun?

    2. Relevant equations
    Kinetic Energy = 1/2 m v^2

    3. The attempt at a solution
    Ok I release that Kinetic Energy depends on the square of the velocity so does this mean that the velocity is more important that the mass of the bullet/gun?
  2. jcsd
  3. Feb 27, 2008 #2


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    Science Advisor
    Homework Helper

    Think about conservation of momentum. The gun and the bullet will have equal and opposite momenta after the bullet is fired. But the gun is much more massive.
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