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Gravity is different in every part of the earth

evident

evident

Lifer
read this article on BBC this morning.

http://www.bbc.co.uk/news/science-environment-12911806

pretty interesting project they have there. They didnt explain how much of a difference in gravity there is though. My physics background is limited to two basic college courses so its pretty limited. Hopefully funding for science projects like this don't get cut in the future either since it could be really useful down the line
 
I think it varies about 0.5%

I remember first learning about this in The Hunt for Red October (the book), where the Russian subs use gravimeters to navigate through a trench.
 
Do a google image search on "bouguer gravity anomaly" and "free air gravity anomaly" and find a map of gravity for your fair town.

In one of my geophysics classes one student project was to determine if gravity anomalies would have a measurable impact on ski jumping results for events held in different parts of the world. The answer was "yes", gravity could explain up to a centimeter or so of additional/less distance in ski jumping.

Also, gravimeters can detect differences in gravity within a room based on whether you set them on a table or on the floor.
 
Gravity is a function of the mass of the 2 bodies and the distance between their centers of mass, correct? It's something like that, either way most entry level college physics students would know this. Not exactly breaking news. It IS kind of cool that you can find an approximate map of the gravity changes, but the fact that this happens hasn't been a mystery.
 
bah, reading the original post i sound like a dumbass. i just thought the satellite they launched was pretty neat. i'll go hide in the corner from all you physics experts now
 
I learned this on Bill Nye as a kid! Bill Nye weighed something like 1lb less at the bottom of Death Valley vs the top of some mountain.
 
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If you are one of the first one hundred callers I'll even reduce the price of the 3 easy payments to $29.99 each. Act now, operators are standing by!
 
evident said:
read this article on BBC this morning.

http://www.bbc.co.uk/news/science-environment-12911806

pretty interesting project they have there. They didnt explain how much of a difference in gravity there is though. My physics background is limited to two basic college courses so its pretty limited. Hopefully funding for science projects like this don't get cut in the future either since it could be really useful down the line
Click to expand...

In what way can this be really useful? We already have lots of projects that are already proven useful that don't get enough funding.
 
I think there's an XKCD comic where he points out that the difference in gravitation means that in the Olympics, city A vs. city B, pole vaulters should be able to jump about a half centimeter higher.
 
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