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  LiveWire / Teen Forums / Science & Business / Viewing Topic

Does gravity exist?
Replies: 72Last Post Jan. 13, 2007 10:32am by norock
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Jason0


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Contrary to what some have been saying, if you removed all mass on Earth gravity would NOT be zero.  Every single object in the universe exerts a gravitational pull on every other.  The only way to avoid this pull is by going to infinity, which is in all likelihood impossible at this point.

As such there will still be a gravitational pull from every other body of mass in the universe.  The inverse square law will give you the amount of the gravity, which drops off with the square of the distance and explains why you don't go flying away from the pull of another galaxy.  

If you wanted to get rid of gravity altogether, theoretically you would have to remove all mass in the entire universe.


2:17 pm on Dec. 15, 2006 | Joined May 2006 | 149 Days Active
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The Samsoniteman


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Quote: from Jason0 at 10:17 pm on Dec. 15, 2006

If you wanted to get rid of gravity altogether, theoretically you would have to remove all mass in the entire universe.

blalargh gravity is a universal force that exists independently of the things it acts on blaragh.

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3:46 pm on Dec. 15, 2006 | Joined June 2004 | 1033 Days Active
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Apotheosis



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Quote: from The Samsoniteman at 6:46 pm on Dec. 15, 2006

Quote: from Jason0 at 10:17 pm on Dec. 15, 2006

If you wanted to get rid of gravity altogether, theoretically you would have to remove all mass in the entire universe.

blalargh gravity is a universal force that exists independently of the things it acts on blaragh.


You could liken this to killing all criminals on Earth and then asking if the Law still exists.

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children of the wood


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Quote: from The Samsoniteman at 10:42 am on Dec. 14, 2006

Gravity is a force that acts on mass. You can have gravity without mass like you can have water without fish. And it's the conservation of energy, not mass.
Its for both energy and mass, mass can't be created or destroyed as energy can, maby it isn't called law od conservation of mass, but mass still has to be conserved.

Post edited at 5:36 pm on Dec. 15, 2006 by children of the wood

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Jason0


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Quote: from The Samsoniteman at 3:46 pm on Dec. 15, 2006

Quote: from Jason0 at 10:17 pm on Dec. 15, 2006

If you wanted to get rid of gravity altogether, theoretically you would have to remove all mass in the entire universe.
 

blalargh gravity is a universal force that exists independently of the things it acts on blaragh.


I didn't say the force would disappear, but there would be nothing for it to act on.  So one could argue that it would not exist.  

Post edited at 9:11 pm on Dec. 15, 2006 by Jason0


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Aimforthehead


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If your question is "If there is nothing for gravity to bring down, is there still gravity?" then, When a tree falls in a forest and no one is around does it make a sound?

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The Samsoniteman


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Quote: from children of the wood at 1:35 am on Dec. 16, 2006

Its for both energy and mass, mass can't be created or destroyed as energy can, maby it isn't called law od conservation of mass, but mass still has to be conserved.

Honestly, mass is destroyed all the time. It's happening right now in your smoke alarm.

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7:00 am on Dec. 16, 2006 | Joined June 2004 | 1033 Days Active
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Quote: from children of the wood at 8:35 pm on Dec. 15, 2006

Its for both energy and mass, mass can't be created or destroyed as energy can, maby it isn't called law od conservation of mass, but mass still has to be conserved.
You're thinking about chemistry, I think. In physics, you can destroy mass. It's fun.

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andrewcool


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Quote: from The Samsoniteman at 9:00 am on Dec. 16, 2006

Quote: from children of the wood at 1:35 am on Dec. 16, 2006

Its for both energy and mass, mass can't be created or destroyed as energy can, maby it isn't called law od conservation of mass, but mass still has to be conserved.

Honestly, mass is destroyed all the time. It's happening right now in your smoke alarm.



Mass can't be created nor destroyed. Its Transformed!

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10:54 pm on Dec. 18, 2006 | Joined Aug. 2004 | 702 Days Active
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The Samsoniteman


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Quote: from andrewcool at 6:54 am on Dec. 19, 2006

Mass can't be created nor destroyed. Its Transformed!

Transformed ... into non-mass?

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2:19 am on Dec. 19, 2006 | Joined June 2004 | 1033 Days Active
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AudibleSin


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Well the thing is... Gravity is basically a very researched guess, I know it's proven and such, But the manipulation of it isn't fully understood. You can test things WITH gravity but you can't really test gravity itself.


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Stormblazer


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Quote: from azp at 8:59 pm on Dec. 8, 2006

I was just wonderring the other day, does gravity exists without matter? For instance, if we obliterate all land and all other substance within earth completely except for gravity, whats going to happen with this force? Would it still exist or would it just suddenly vanish? After a while, this question lead me to the theory of formation of blackholes, since the purpose of gravitation is just suction built on the foundation of land and since my perceptions of blackholes is suction without land, I believed this is how blackholes are formed. I never taken any science courses, so I wouldn't know, but if any of you do take science courses, is my assumption correct?

Gravity is a force OF matter (mass). It's not a separate force.
I think your misconception is because one, you've never taken any science courses, and two, you completely misunderstand what a black hole is.

A black hole isn't a hole at all, it is, in fact, an extremely dense ball of matter (land, as you call it). It's not suction either, gravity is attraction of matter to matter. More matter = stronger attraction. There's also other effects, but I don't know enough of the details to explain them clearly, especially since you've not had any courses in science.

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6:32 pm on Dec. 19, 2006 | Joined April 2005 | 257 Days Active
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Stormblazer


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Quote: from andrewcool at 11:54 pm on Dec. 18, 2006

Mass can't be created nor destroyed. Its Transformed!

True, it's not technically "created" or "destroyed," more converted from/to energy. I.e. in nuclear fission, atoms of uranium are converted into energy, so while there is less actual mass, it's not "destroyed" as there is the equivalent energy levels (remember E=MC^2).

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6:38 pm on Dec. 19, 2006 | Joined April 2005 | 257 Days Active
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norock


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Gravity is the resultant force of the pull between two objects due to the relationship between their distances and their massive (not meaning huge, referring to mass) depressions in the space time continuum. if there was no mas to depress the continuum, there would be no existing gravity.

its not like a sound (ie if a tree falls and no one hears it does it make a sound?) wherein you have vibrations, and if you were to take away the particles that vibrate, it would cease to exist.

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9:39 pm on Dec. 21, 2006 | Joined Dec. 2006 | 343 Days Active
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TheKK


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Well actually, the cause of gravity is kind of still unknown (could be gravitons as likely as it could be a deformation in the space-time continuum).

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TKK

4:46 am on Dec. 23, 2006 | Joined Dec. 2006 | 1 Days Active
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