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Work Energy Theorem Problem

  1. Feb 15, 2012 #1
    1. The problem statement, all variables and given/known data

    A weapon fired a 25.8-kg shell with a muzzle speed of 880 m/s. What averageforce acted on the shell?

    2. Relevant equations

    work energy theorem?

    3. The attempt at a solution

    Can someone please explain where the 6.00 comes from???

    Starting from rest, the shell acquired a kinetic energy of (1/2)mv2

    by a force, F,acting through a distance, d.Fd = (1/2)mv2
    F(6.00) = (1/2)(25.8)(880)2
    F = 1664960 N = 1.66 MN
    Last edited: Feb 15, 2012
  2. jcsd
  3. Feb 15, 2012 #2


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    welcome to pf!

    hi razzmatazz! welcome to pf! :wink:

    6 m must be the length of the muzzle (didn't the question say so?) :smile:
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