Nigel_
Second Officer
Flight distance : 388642 ft
United Kingdom
Offline
|
piowoc73 Posted at 2017-3-8 10:36
Gravity does indeed change with altitude. The gravitational force above the Earth's surface is proportional to 1/R2, where R is your distance from the center of the Earth. The radius of the Earth at the equator is 6,378 kilometers, so let's say you were on a mountain at the equator that was 5 kilometers high (around 16,400 feet). You would then be 6,383 kilometers from the Earth's center, and the gravitational force would have decreased by a factor of (6,378 / 6,383)2 = 0.9984. So the difference is less than 0.2%.
Don't forget that mountains are heavy and generate their own gravity, those particular mountains generate more than normal. It is only a small difference but these things can add up. |
|