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Difference of weight question

  1. Apr 19, 2016 #1
    1. The problem statement, all variables and given/known data
    Ned climbs to the peak of Mt. Everest, the tallest peak on Earth at 8850 m above sea level. Ned's mass is 95 kg, the mass of Earth is 5.98 x 1024 kg, and Earth's radius is 6.37 x 106 m. What is the difference in Ned's weight when comparing his weight at the top of the mountain to his weight at sea level?

    2. Relevant equations
    Fg = Gm1m2 / r2
    g = Gm / r2
    g = Fg / m
    3. The attempt at a solution
    I think I have the field strength equal to 9.80 N using the equation g = Gm / r2 . After that I'm lost, I have no idea how to get his weight at the top of the mountain!
  2. jcsd
  3. Apr 19, 2016 #2
    Sorry, mass of earth should be 5.98 x 1024kg and radius of earth should be 6.37 x 106m
  4. Apr 19, 2016 #3


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    Same formula, but are all the variables in it the same value?
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