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Homework Help: Orbital speed please clarify!

  1. Jul 23, 2010 #1
    1. The problem statement, all variables and given/known data
    A satellite of mass 600kg is in a circular orbit about the earth at a height above the earth equal to the earth's mean radius. Find:
    a) the satellite's orbital speed
    b) the period of its revolution
    c) graviational force acting on it

    2. Relevant equations
    a) v^2 = GM/r

    b) T = (2pie) r/ v

    c) F = GmM/r^2

    3. The attempt at a solution
    for part a, is the satellites orbital speed dependent on the mass of the earth??? Do I use mass of earth? or the satellite?
  2. jcsd
  3. Jul 23, 2010 #2


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    Homework Helper

    Part a) you are equating the centripetal force on the satellite, so the mass of the satellite cancels out. The rest look correct.
  4. Jul 23, 2010 #3
    ok. thanks.
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