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Originally posted by Merger
So..the question is..... is gravity INFACT 0 at the centre of the earth?
Interesting question, one I can't put an opinion on.......
Either way, your opinion/fact would greatly satisfy me!
Gravity in a valley and in a mountain top is exactly the same.
A ten kg object and a feather will fall with the same acceleration towards Earth in a tube without air, because mass does not play a role in gravity.
Originally posted by Masisoar
Also, don't forget that mountains (due to their huge mass, above and below the earth) have their own gravitation attraction, so it could possibly have some distortion of the pull on top of the mountain.
Originally posted by CAPT PROTON
Gravity may be high at Everest because of height and mineral density, but as you move south to the equator into indonesia at sea level, gravity begins to spike again there as well which has a high level of vulcanism.
Originally posted by knowledge23
The mass of the mountain is obviously less than that of earth. How do you make it negligible? For the sake of comparision, it is important to understand the density of earth. Different rocks for example heavier rocks could be formed under Mt Everest and hence refering to the question, mass will increase, which does directly affect the equation.