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Gravitational pull on a spaceship by Earth = that of the Moon

  1. Oct 6, 2012 #1
    1. The problem statement, all variables and given/known data

    A rocket on its way to the moon passes through point P (along the line
    connecting the earth and the moon) where the gravitational pull by the
    moon is exactly equal to the gravitational pull by the earth. Neglect the
    motions of the moon and the earth and find the distance of point P from the
    earth's surface.

    Me= 5.97 x 10^24 kg

    Mm= 7.34 x 10^22 kg

    r= 3.84 x 10^8 m


    2. Relevant equations

    fg=Gm1m2/r^2



    3. The attempt at a solution

    Honestly, dont even know where to start. Any help will be greatly appreciated.
     
  2. jcsd
  3. Oct 6, 2012 #2
    What's the pull by the Moon? By the Earth?
     
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