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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
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    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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