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Rotational speed due to gravitational pull in earth's orbits

  1. Jan 5, 2014 #1
    Hi All,

    Assume we have a package that we want it in an orbit with highest possible speed. In which orbit (low,mid,high) the package will rotate faster ? Due to smaller distance, low earth orbit should allow more speed but there is also more air friction there. What would be the mathematical relation to derive rotational speed dependent on other variables? What kind of parameters should be introduced for a more realistic description of the problem?

    Thank you.
  2. jcsd
  3. Jan 5, 2014 #2

    D H

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    Staff Emeritus
    Science Advisor

    This question does not belong in special and general relativity. Classical physics is more than capable of answering this question, which is where I have moved this thread.

    The answer is simple: Lower. Kepler's third law.

    What if the object gets so low that atmospheric drag becomes significant? Simple: The object is no longer orbiting. It's reentering the Earth's atmosphere.
  4. Jan 5, 2014 #3
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