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Homework Help: Is this a Kepler law problem?

  1. Jan 27, 2005 #1
    A satellite hovers over a certain spot on the equator of (rotating) Pluto. What is the altitude of its orbit (called a "synchronous orbit")?
     
  2. jcsd
  3. Jan 27, 2005 #2

    dextercioby

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    You need to know:
    1.Mass of Planet Pluto.

    2.The 2-nd law of dynamics.

    3.The law of gravitational attraction.

    4.The period of rotation around its axis for the planet Pluto.

    Daniel.
     
  4. Jan 27, 2005 #3
    ok thx brb , sheesh this is killing me.
     
  5. Jan 27, 2005 #4
    Well i know

    Mass of Pluto = 1.196 x 10 ^ 22 kg

    Period of Rotation = 6.39 days

    I don't know where i go from there?
     
  6. Jan 27, 2005 #5

    dextercioby

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    U'll need the [tex] \omega=\frac{2\pi}{T} [/tex]

    So express the T (period in seconds).Then find the angular velocity and then appy the 2-nd law of dynamics...

    Daniel.
     
  7. Jan 27, 2005 #6
    Is 2nd law of dynamics, you mean Newtons 2nd law? Because I haven't taken dynamics class yet.
     
  8. Jan 27, 2005 #7

    dextercioby

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    Yes,of course.Report any bad results,if any.

    Daniel.
     
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