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Force that the Earth exerts on the Moon

  1. Oct 12, 2011 #1
    Let's say that the Moon has a mass of 7.4 x 10^22 kg. What's the force that the Earth, and the Sun exerts on the Moon?
     
  2. jcsd
  3. Oct 12, 2011 #2

    Janus

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    Just use

    [tex]F_g = \frac{Gm_1 m_2}{d^2}[/tex]
     
  4. Oct 12, 2011 #3

    Drakkith

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    There's a gravitational force calculator if you search google as well.
     
  5. Oct 12, 2011 #4
    Got it, thanks!
     
  6. Oct 14, 2011 #5
    One could also use its mean radius, mass, and orbital velocity...
     
  7. Oct 14, 2011 #6

    Drakkith

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    Why does radius matter?
     
  8. Oct 14, 2011 #7

    DaveC426913

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    of its orbit.
     
  9. Oct 14, 2011 #8
    Yes, thank you DaveC. Sorry, Drakkith, for not clarifying that.
     
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