Gravity force between Earth and Moon from this angle

  • #1
1
0

Homework Statement


Hello the text is in swedish but ill try my best to translate,
What it says is:
Determine the resultant force on the moon with regard to thr gravitation force from the sun and the earth when it's in this position shown in the figure [ picture http://m.imgur.com/AfJOVZo ]
J represents earth and M represents the moon, i hope you can help me!! I will be very grateful if you do!

I tried 9.82 x 1/81 (moon weight to earth) but it was wrong!
It has to do with newtons laws though (9.82 for earth gravity force)

Homework Equations




The Attempt at a Solution

 

Answers and Replies

  • #2
Doc Al
Mentor
45,029
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Hint: Look up Newton's law of universal gravity.
 
  • #3
249
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The Sun and Earth will exert separate gravitational forces on the moon. Try determining these forces first. Once you have them, you can use the concept of vector addition.
 

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