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A moon is orbiting around the planet with a constant distance of 4.0 x 10^8 with

  1. Nov 23, 2012 #1
    A moon is orbiting around the planet with a constant distance of 4.0 x 10^8 with....

    1. The problem statement, all variables and given/known data

    Question/w formulas are in attachment.

    I know I've been given two masses, 5.5 and 7.35 x 10^ 22 kg, and a distance of 4.0 x 10^8. But what I don't understand is the speed of 950 m/s and the 1/4 distance part. I know you use the formula F=Gm1m2/r^2 formula but what do you do with the velocity that is given and how do you find the 1/4 the distance apart?
     

    Attached Files:

  2. jcsd
  3. Nov 23, 2012 #2

    tiny-tim

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    hi vipson231! :smile:
    the gravitational force will be the centripetal acceleration times the mass :wink:
     
  4. Nov 23, 2012 #3
    Re: A moon is orbiting around the planet with a constant distance of 4.0 x 10^8 with.

    I already got the answer. Thank you for the clarification though =)
     
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