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Homework Help: Orbit problems

  1. Mar 29, 2009 #1
    ok just a couple orbital questions I forget the equation that needs to be used and do not have my textbook with me so if anyone knows the equation for finding orbital speed that would be great!

    1. calculate the speed of a satellite in orbit 9.5 x10^3 km above jupiter.
    radius of jupiter = 7.18 x 10^7 m
    Mass of jupiter = 1.90 x 10^27 kg

    2. The average radius of orbit for jupiter is 7.78 x 10^11m. usuing Cs = 3.355 x 10^18 m^3/s^2, calculate the number of earth years it will take for jupiter to complete one orbit.

    So what does it mean by Cs and how do you find the time for one orbit? I have trouble getting the problems started if i'm given a hint i can usually find the answers on my own so anything will help.
  2. jcsd
  3. Mar 29, 2009 #2


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    Homework Helper

    Welcome to PF.

    You can always figure out what you want.

    You know the Gravitational Force.

    And it will balance with the centripetal force won't it?
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