Center of the Earth, Vol. 2 [OT]
Søren Krarup Olesen
raptus at stofanet.dk
Sat Mar 20 04:12:28 CET 2004
>> So the downwards pull of gravity gets less and less, until in the middle
>> you'd be weightless.
> If the gravity arises from mass only, you'd certainly be affected by
> those upper shells as well, in other words, you'd experience
> weightlessness long before you reach the middle of the Earth.
Oops, I forgot the symmetry. Clearly at the absolute center of Earth all
forces are equally distributed in all direction, hence the gravity must
equal zero. Still those "shells" you mention do have an influence.
Sorry, no more OT from my hand...for now :-)
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