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28 August, 09:46

What should the radius of the orbit be (measured from the center of Mars), if we want the satellite to take 8 times longer to complete one full revolution of its orbit

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  1. 28 August, 10:47
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    Answer and Explanation:

    For a satellite of mass m, orbiting at a distance r from the center centrpetal force = gravitationa pull:

    GmM/r2 = mw2r

    or GM = w2r3 = (2Pi/T) 2 * r3

    or (T1/T2) 2 = (r1/r2) 3

    Given TT2/T1 = 8, r1 = 2.2rmars + rmars = 3.2rmars

    (r2/r1) 3 = 8 2 = 64 = 43

    (r2/r1) = 4

    r2 = 4 * r1 = 4 * 3.2rmars = 12.8rmars

    So distance of the satellite from the center of Mars = 12.8rmars = 12.8 * 3.397 x 106 m = 4.348 x 107 m
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