How the hell does Gravity work ?
- Thread starter Zersy
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One explanation is that mass bends space time like a ball placed in the middle of a stretched out sheet warps the sheet. If you place another smaller ball on the sheet it will follow the curve in the sheet. The hard part is visualising what space time is, which is why people like Einstein are cool.
Probably all wrong or oversimplified.
Probably all wrong or oversimplified.
yes witchcraft it explains gravity wind electricity kittens and nukesUNKNOWNINCOGNITO said:
i hear gravity pulls harder on you the more you weigh so that means fat people are hogging the gravity
Not oversimplified, that is a very used analogy (although space-time is at least 4 dimensional and so on and so forth)More Fun To Compute said:
Gravity is the effect that mass has on space-time and thereby on objects with mass (or energy since mass and energy are the same).
A more thorough explanation requires at least a rudimentary knowledge of Newtonian Mechanics and field-theory will help as well. Einsteins Special relativity is not that hard to learn and explains a lot of it. If you really want to know what's known about gravity you need to read his general theory of relativity (not for the faint of heart physics-wise)
Gravity is a force from a mass acting upon you pulling you towards it, the force is given by the equation:
Force (towards) = - (Universal Gravitational constant x Mass of object 1 x Mass of object 2) / Distance between two objects
Gravity is just a force of attraction, sitting next to someone on a bench you are applying a force similar to gravity on them, however since your mass is much less than the Earths they don't fly towards you.
Universal Gravitational constant = 0.0000000000663 (arbitrary units that I cant remember), in case you feel like working anything out for fun, I did, don't you look at me like that, science is fun!
EDIT: For a couple of you above, thus far gravity has been constant down to the quantum level, which has been a problem with the theories you mentioned, however in the coming months experiments will be conducted at the quantum level to see if the effects of gravity change, I read an article in New Scientist earlier this year on it.
Force (towards) = - (Universal Gravitational constant x Mass of object 1 x Mass of object 2) / Distance between two objects
Gravity is just a force of attraction, sitting next to someone on a bench you are applying a force similar to gravity on them, however since your mass is much less than the Earths they don't fly towards you.
Universal Gravitational constant = 0.0000000000663 (arbitrary units that I cant remember), in case you feel like working anything out for fun, I did, don't you look at me like that, science is fun!
EDIT: For a couple of you above, thus far gravity has been constant down to the quantum level, which has been a problem with the theories you mentioned, however in the coming months experiments will be conducted at the quantum level to see if the effects of gravity change, I read an article in New Scientist earlier this year on it.
This ^Jursa said:
Because the apple then killed him, he never had a chance to undo the gravity spell that he cast.
Hence... MAGIC!
fo srs bsns.... go google it first.
UnknownIncognito, I think we've been pretty tolerant so far (remember the irrelevant jokes thread?), but this is getting silly now. I'm asking you nicely, could you please just stop posting stupid threads that have no real merit for discussion? Thank you.
On topic, however, gravity works because of quantum physics. Every atom is made up of seperate elementary particles (protons, neutrons and electrons), but each of these is made up of even smaller particles (quarks, mesons, besons, etc.). Some of these particles, which every atom has at some fundamental level, are gravitons, which are basically attracted to each other according to Newton's Law of Gravitation. That's how gravity works. How they are attracted is similar to electromagnetism. There are four forces - weak, strong, electromagnetic, and gravitational, which are all basic properties of these fundamental particles (each type of particle has different properties, however). So these forces are what allow gravity, and it isn't just big things like planets, but everything in the universe is attracted to everything else. It's only noticeable at planetary sized levels though, since the force of gravity is minutely small for each particle, so only absolutely huge objects like planets have any sort of major gravitational pull.
That's basically it, as far as I can remember, but Wikipedia might be able to fill in any gaps since my own knowledge is based on a Quantum Physics course I did at A-Level.
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On topic, however, gravity works because of quantum physics. Every atom is made up of seperate elementary particles (protons, neutrons and electrons), but each of these is made up of even smaller particles (quarks, mesons, besons, etc.). Some of these particles, which every atom has at some fundamental level, are gravitons, which are basically attracted to each other according to Newton's Law of Gravitation. That's how gravity works. How they are attracted is similar to electromagnetism. There are four forces - weak, strong, electromagnetic, and gravitational, which are all basic properties of these fundamental particles (each type of particle has different properties, however). So these forces are what allow gravity, and it isn't just big things like planets, but everything in the universe is attracted to everything else. It's only noticeable at planetary sized levels though, since the force of gravity is minutely small for each particle, so only absolutely huge objects like planets have any sort of major gravitational pull.
That's basically it, as far as I can remember, but Wikipedia might be able to fill in any gaps since my own knowledge is based on a Quantum Physics course I did at A-Level.
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