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Homework Help: Putting an item into orbit. Help

  1. Dec 3, 2008 #1
    1. The problem statement, all variables and given/known data
    No idea how to do this honestly, but here it is. Hopefully someone can just work this out and I can learn from that. Calculate the velocity needed to place a 14.5kg item (its a turkey but whatever lol) into orbit around the Earth at an elevation of 100km. The radius of the Earth is 6500km. Like I said I'm not sure to how to do this and I need to know.


    2. Relevant equations
    I was given formulas ( These might have nothing to do with it, beware) Fc=mu2/r
    ac=4pi2rf2


    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 3, 2008 #2

    turin

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    Read the stickies.
     
  4. Dec 3, 2008 #3
    The point is I don't know how to do it, I have no work. Obviously I'm not going to get any help so someone just delete this...
     
  5. Dec 3, 2008 #4

    LowlyPion

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    In general you know that there will need to be a conservation of energy to accomplish this don't you?

    So doesn't the sum of the PE at surface + KE initial = PE at orbit + KE of object in orbit?
     
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