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Homework Help: Gravity and mass with Jupiter's moons

  1. Feb 13, 2013 #1
    1. The problem statement, all variables and given/known data

    Table 5-2 gives the mean distance, period, and mass for the four largest moons of Jupiter (Those discovered by Galileo in 1609). A) Determine the mass of Jupiter using the data for Io B) Determine the mass of Jupiter using data for each of the other three moons. Are the results consistent?

    Moon Mass(kg) Period (Earth Days) Mean distance from Jupiter in km
    Io 8.9*10^22 1.77 422*10^3
    Europa 4.9 3.55 671
    Ganymede 15 7.16 1070
    Callisto 11 16.7 1883

    2. Relevant equations


    3. The attempt at a solution

    I don't know how to find g1 with the given information. Do I eliminate m2 in order to find g1? I also have no idea what the purpose of the period is, is it just there to confuse us?
  2. jcsd
  3. Feb 13, 2013 #2


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    Try using Kepler's laws.
  4. Feb 14, 2013 #3
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