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Homework Help: Resulting velocity

  1. Feb 10, 2009 #1
    1. The problem statement, all variables and given/known data
    On Earth, an astronaut and equipment weight 1,960.0 N. While weightless inspace, the astronaut fires a 100 N rocket backpack for 2.0 s. What is the resulting velocity of the astronauts and equipment?

    2. Relevant equations


    3. The attempt at a solution
    t=2.0 s

    i am super lost...
    idk which equation to use :S
    i only know of
    v=d/t :S
    please help... i would truly appreciate it....
  2. jcsd
  3. Feb 10, 2009 #2


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    Homework Helper

    You know the weight, so figure the mass.

    You know the force, so figure the acceleration. F = M*a after all.

    You know the acceleration, you know the time ... you know the answer.
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