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March 26, 2017

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Mars has a mass of about 6.4 X 10^23 kg, and its moon Phobos has a mass of about 9.6 X 10^15 kg. If the magnitude of the gravitational force between the two bodies is 4.6 X 10^15 N, how far apart are Mars and Phobos?

  • Physics - ,

    Gravitational force =
    G m M/R^2

    Look up G (the universal constant of gravity) and solve for R, which is the distance bewteen the centers of Mars and Phobos.

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