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Equation for force from Vf, mass, and joules?

  1. May 30, 2013 #1
    So I'm doing some research regarding firearms and need to know the amount of force on the bolt assembly as the bullet is fired. Using a .45 caliber Federal bullet, the mass of the projectile is 15 g, the energy is 500j, and the Vf is 260 m/s. I need to know how to convert these numbers into a function of force, and, if possible, into acceleration. Essentially, I'm wanting to know the acceleration of a given mass based on the force or acceleration produced by the bullet. If any more information is needed, please let me know and I'll do my best to produce it. Thanks!
  2. jcsd
  3. May 30, 2013 #2


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    Staff: Mentor

    Welcome to the PF.

    Wikipedia has a reasonable intro article about the subject of firearm physics:


    If you don't understand something in the article, post a quote here and we should be able to help you understand it.
  4. May 30, 2013 #3


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    Staff Emeritus
    Science Advisor
    Homework Helper

    You should research the topic 'internal ballistics'.
  5. May 30, 2013 #4
    Thanks for the replies and links!
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