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Calculate the average recoil force exerted on the weapon during that burst.

  1. Nov 1, 2009 #1
    1. The problem statement, all variables and given/known data
    A soldier on a firing range fires an 8-shot burst from an assault weapon at a full automatic rate of 1000 rounds per minute. Each bullet has a mass of 7.49 g and a speed of 299 m/s relative to the ground as it leaves the barrel of the weapon.


    2. Relevant equations



    3. The attempt at a solution
    i dont understand how 8-shot burst and 1000rounds are related
    i dont know how to start this question and what basic concept should be used
     
  2. jcsd
  3. Nov 1, 2009 #2

    tiny-tim

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    Hi zhuyilun! :smile:

    When a bullet leaves a gun, the gun recoils, which means that it moves backwards.

    It does so because of conservation of momentum. :wink:

    (and what is the relationship between force and momentum?)
     
  4. Nov 1, 2009 #3

    i get this part now~!! thanks, but what is the relationship between 8-shot burst and 1000 rounds per second
     
  5. Nov 1, 2009 #4

    tiny-tim

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    It's telling you that the burst takes .008 seconds. :smile:
     
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