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Recoil of astronaut pushing a tool

  1. Apr 2, 2009 #1
    1. The problem statement, all variables and given/known data

    An astronaut stranded in space throws a 0.70kg tool backwards at -12.0m/s in order to return to her spaceship. If she and her spacesuit together have a total mass of 90kg, how fast and in what direction is she moving after throwing the tool?


    I'm not sure what to use. It has to be one that uses mass and velocity, im just not sure.
  2. jcsd
  3. Apr 2, 2009 #2
    Re: Momentum

    Look at conservation of momentum.
  4. Apr 3, 2009 #3
    Re: Momentum

    Got it, thanks. All I ususally need is something to jumpstart my brain.
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