# gravity and centrifugal force

joe shmo
Science 20 Aug '08 01:12
1. joe shmo
Strange Egg
20 Aug '08 01:12
I have heard that if our Earth were to stop rotating our atmosphere would dissapate into space. My conceptualization of the scenario; Gravity is caused by mass curving space-time... The Earth rotating about it axis, exerts a centrifugal force, which acts in opposition to gravitation......Why, would stopping the rotation of the Earth, negate the affect of gravity, when logically, at least to me.....it seems quite opposite?

Hope someone can explain this in layman terms, thanks...
Eric ππ
2. coquette
20 Aug '08 01:381 edit
You have it about right. If the earth stopped rotating, the gases would lose some of their centrifugal force - about a 1000 miles per hour at the equator - and the gravitational attraction would increase.

The gases wouldn't dissipate into space. That person had it backwards.
3. joe shmo
Strange Egg
20 Aug '08 01:48
Originally posted by coquette
You have it about right. If the earth stopped rotating, the gases would lose some of their centrifugal force - about a 1000 miles per hour at the equator - and the gravitational attraction would increase.

The gases wouldn't dissipate into space. That person had it backwards.
haha thanks...hope you are correct....... bacause I just gave my father an " I told you so"...π And he is not taking the news all that wellπ
4. 20 Aug '08 04:25
The Earth's atmosphere is actually leaking, but of other reasons. Fortunate not much.

Facts:
The planet with the most rapid rotation has the thickest atmosphere.
The body with the strongest gravity is leaking the most.
5. sonhouse
Fast and Curious
20 Aug '08 05:57
Originally posted by FabianFnas
The Earth's atmosphere is actually leaking, but of other reasons. Fortunate not much.

Facts:
The planet with the most rapid rotation has the thickest atmosphere.
The body with the strongest gravity is leaking the most.
That would be the sun then.
6. 20 Aug '08 06:26
Originally posted by sonhouse
That would be the sun then.
""The body with the strongest gravity is leaking the most.""
"That would be the sun then."
Yes.
What about the other? the planet?
7. 20 Aug '08 06:43
Originally posted by FabianFnas
""The body with the strongest gravity is leaking the most.""
"That would be the sun then."
Yes.
What about the other? the planet?
Presumably, that would be Jupiter.

--- Penguin.
8. sonhouse
Fast and Curious
20 Aug '08 10:20
Originally posted by Penguin
Presumably, that would be Jupiter.

--- Penguin.
Last I heard it was the biggestπ
Since it still has an impressive atmosphere after 4 billion years I think it safe to say it will have just as impressive one in another 4 billion years, maybe even surviving the coming red giant phase of the sun.
9. 20 Aug '08 10:301 edit
Originally posted by sonhouse
Last I heard it was the biggestπ
Since it still has an impressive atmosphere after 4 billion years I think it safe to say it will have just as impressive one in another 4 billion years, maybe even surviving the coming red giant phase of the sun.
Gravitation rules! The most dominant planet in the solar system gravitationally.

Next is Saturn, but in the same time it has the lowest density. It floats in water (!?) π
10. uzless
The So Fist
20 Aug '08 19:15
Originally posted by FabianFnas

Next is Saturn, but in the same time it has the lowest density. It floats in water (!?) π
So do very small rocks
11. 20 Aug '08 20:05
Originally posted by uzless
So do very small rocks
Rocks have a density of around 5 kg/dm3, they never float in water.
12. flexmore
Quack Quack Quack !
21 Aug '08 00:24
Originally posted by joe shmo
I have heard that if our Earth were to stop rotating our atmosphere would dissapate into space. My conceptualization of the scenario; Gravity is caused by mass curving space-time... The Earth rotating about it axis, exerts a centrifugal force, which acts in opposition to gravitation......Why, would stopping the rotation of the Earth, negate the affect of g ...[text shortened]... it seems quite opposite?

Hope someone can explain this in layman terms, thanks...
Eric ππ
Rotation of the earth causes the atmosphere to be thicker at the equator ... and thinner at the poles. Without the spin the atmosphere at the equator would be thinner.
13. sonhouse
Fast and Curious
21 Aug '08 03:27
Originally posted by flexmore
Rotation of the earth causes the atmosphere to be thicker at the equator ... and thinner at the poles. Without the spin the atmosphere at the equator would be thinner.
splain that.
14. AThousandYoung
West Coast Rioter
21 Aug '08 04:501 edit
Originally posted by sonhouse
splain that.
Gravity acts as centripetal force best when the center of the Earth is also close to the center of the circle of orbit. Air particles are basically orbitting the Earth when it and they spin.

If an air particle were going around, say, one of the higher latitutes, gravity would have two compents; a centripetal one, and one that pulls the air particle toward the equator. Think about it.
15. AThousandYoung
West Coast Rioter
21 Aug '08 04:52
Originally posted by FabianFnas
Rocks have a density of around 5 kg/dm3, they never float in water.
Pumice does.