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Gravitation questions

  1. Aug 8, 2015 #1
    1. The problem statement, all variables and given/known data

    at what distance above the earth surface and at what depth below the earth surface,is the acceleration due to gravity less by 10% of its value at surface? R=6400 km
    2. Relevant equations


    3. The attempt at a solution
    g'/g = (1- 2h)/R
     
  2. jcsd
  3. Aug 8, 2015 #2
    i have done this problem and the answer is coming out to be 320 km but it is 345.6 km.......
     
  4. Aug 8, 2015 #3

    SteamKing

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    Well, show us your calculations.
     
  5. Aug 8, 2015 #4
    fine:smile::smile::smile::smile::smile::smile::smile::smile: 100-10=90/100=0.9 means gh is 0.9 times of g therefore 0.9=2h/R which is 0.9=2h/6400
     
  6. Aug 8, 2015 #5

    SteamKing

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    That doesn't match the formula you have in the OP. Have you written the formula correctly?
     
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