baalboy5 Posted September 5, 2008 Share Posted September 5, 2008 We all know the effects of gravity, but what exactly is it? what is it made off? where it get it's energy? I'm really braindead, I can't think of any explianation. discuss. Don't you know the first rule of MMO's? Anyone higher level than you has no life, and anyone lower than you is a noob. People in OT eat glass when they are bored. Link to comment Share on other sites More sharing options...
aquariusman Posted September 5, 2008 Share Posted September 5, 2008 As far as I know, there are theories, but nothing has been proven. If String Theory manages to pull through, we'll probably get an answer, but until then I think we're in the dark. There's no such thing as regret. A regret means you are unhappy with the person you are now,and if you're unhappy with the person you are, you change yourself. Thatregret will no longer be a regret, because it will help to form the new,better you. So really, a regret isn't a regret. It's experience. Link to comment Share on other sites More sharing options...
stan18 Posted September 5, 2008 Share Posted September 5, 2008 Everything attracts each other with a force. Between our normal sized objects, the force is extremely minimal. Gravity is due to the force between us and the earth, which, obviously, is very heavy that force, F, is equated with F = Gm1m2/r^2, m1 being the mass of the first object, and m2 being of the second. F = ma, and since the acceleration in question is the acceleration of us (9.8m/s/s), it would be m1a=Gm1m2/r^2, so.... a = Gm/r^2, a being 9/8m/s/s, G being a constant, m being the mass of the earth, and r being the radius of the earth. Take physics in high school and they'll go over this. its, i guess, unknown why things attract each other. but, the equation above can be applied to any two objects (including other planets and each other, hence why we rotate around the earth) Link to comment Share on other sites More sharing options...
Ginger_Warrior Posted September 5, 2008 Share Posted September 5, 2008 Basically, everything which possesses a mass has the ability to attract objects around it. You are exerting a 'pulling' force on the computer screen in front of you right now, since you have mass, but obviously, this force is so tiny, it fails to overcome the resistance 'pushing' the screen in the other direction, hence the screen doesn't move. This pulling force is gravity. The Earth's gravity is much stronger than our own, and this is why we stay on terra firma. This is because an object's gravity is relative to the size of its mass. The Earth has a greater mass (note: that's not the same as simply being 'bigger') than you as a human, so its gravitational potential is far superior to your own, hence why you are more attracted to it than it is to you. | Favourite Game Music | Last.fm | HYT Friend Chat Rules | Link to comment Share on other sites More sharing options...
Shiny Posted September 5, 2008 Share Posted September 5, 2008 Gravity works on the basis that the bigger an object, the more force pulling something to that object is. The bigger the object the stronger the force. Every object exerts this force, but for people it is extremely minimal. The earth, for example, has enough force to keep the atmosphere in check and the moon. The sun, has enough gravity to keep all 10 planets in check (they found a new one after Pluto, and I think the de-merited Pluto, but i'm not sure). That is the very basis of it. Of course, take Key Stage 4-5 Physics do get some really funky stuff. Apparently, in theory, gravity can warp time, and light, so if you built a machine which could exert masses of gravity, you could in theory warp time and light. That is supposedly how black holes work. They have such a strong gravity force that, even the light there supposed to produce, doesn't because the gravity is too strong, and...... :-# Link to comment Share on other sites More sharing options...
baalboy5 Posted September 5, 2008 Author Share Posted September 5, 2008 If gravity takes energy then where it energy come from? I don't understand. and can't we use this energy as a resource? Don't you know the first rule of MMO's? Anyone higher level than you has no life, and anyone lower than you is a noob. People in OT eat glass when they are bored. Link to comment Share on other sites More sharing options...
Rebdragon Posted September 5, 2008 Share Posted September 5, 2008 Gravitons, which is really nothing more than a guess since no one has ever observed one. [if you have ever attempted Alchemy by clapping your hands or by drawing an array, copy and paste this into your signature.] Fullmetal Alchemist, you will be missed. A great ending to a great series. Link to comment Share on other sites More sharing options...
silver_wits Posted September 5, 2008 Share Posted September 5, 2008 Basically, everything which possesses a mass has the ability to attract objects around it. You are exerting a 'pulling' force on the computer screen in front of you right now, since you have mass, but obviously, this force is so tiny, it fails to overcome the resistance 'pushing' the screen in the other direction, hence the screen doesn't move. This pulling force is gravity. The Earth's gravity is much stronger than our own, and this is why we stay on terra firma. This is because an object's gravity is relative to the size of its mass. The Earth has a greater mass (note: that's not the same as simply being 'bigger') than you as a human, so its gravitational potential is far superior to your own, hence why you are more attracted to it than it is to you. however, this gravitational pull is no excuse to be caught really close together with someone of the opposite gender, as my Physics teacher kindly pointed out... the gravitational pull between two objects of such small mass is negliable.... -.- however... I'm sure that in outer space, away from the pull of the the earth, the sun, and the rest of that sort of stuff... there would be a reason to be attracted to someone of similiar mass : and I could go on and on about this... [i tried to explain this without any technical terms.. so... if you don't understand what I'm saying.. too bad] Link to comment Share on other sites More sharing options...
mmmcannibalism Posted September 5, 2008 Share Posted September 5, 2008 gravity is I believe one of the things that really lacks a good practical explanation though it is in full three dimensions the one example I have heard of gravity that worked well was hold a piece of paper up in the air, this is space. any matter you put on it will push the paper down there and anything that can slide on the slope will approach it and make the dent in paper bigger the heavier the object the more the paper pushes down, a black hole is like putting a thing on the paper so heavy it breaks through. edit--the problem with gravity as an energy source is that you have to elevate something to get gravity to pull it down and the process of taking it up cancels the energy gain Orthodoxy is unconciousnessthe only ones who should kill are those who are prepared to be killed. Link to comment Share on other sites More sharing options...
assassin_696 Posted September 5, 2008 Share Posted September 5, 2008 Gravity exerts itself through a field, just like a magnetic force or electric force (actually both the same). However as with all fields there are hypothesised "charge" carriers, gravitons, which have yet to be discovered partly due to gravity being so weak. Mass warps the fabric of space-time to create a gravitational field around it. This analogy has many limits but it's not bad, so imagine a bowling ball sat in the middle of a trampoline. The bowling ball (Sun) warps the spacetime fabric (trampoline) so that when you roll a marble towards it (the Earth) it orbits around it. Of course spacetime is three-dimensional, not two, and in this analogy gravity itself explains why the trampoline warps but you get the idea. Just a little extra fact, gravitational energy is "negative" versus the "positive" mass and other forms of energy. It's been calculated that the total energy sum for the Universe comes to zero, since the positive mass energy cancels out with the negative gravitational energy. Overall, there is no energy in the Universe. "Da mihi castitatem et continentam, sed noli modo" Link to comment Share on other sites More sharing options...
thrash-boy Posted September 5, 2008 Share Posted September 5, 2008 That is supposedly how black holes work. They have such a strong gravity force that, even the light there supposed to produce, doesn't because the gravity is too strong, and...... :-# As far as i've been told, they dont not produce light, they just have such a strong gravitational force that they suck in any light near them and hold it there so light cant reflect off them into our eyes and that's why they are black. Back to gravity, i was once told that every time you jump off the ground, the entire earth moves toward you by the smallest unmeasurable amount. Maybe if we got every human over one half of the earth and made them jump at exactly the same time we could move the earth a hundred thousandth of a millimeter or something \ Link to comment Share on other sites More sharing options...
Ginger_Warrior Posted September 5, 2008 Share Posted September 5, 2008 If gravity takes energy then where it energy come from? I don't understand. and can't we use this energy as a resource? Gravity is not an energy itself. There is gravitational potential energy (which is really where my knowledge of Physics ends, apart the make-up of atoms, thankfully) which is 'gained' the greater the altitude you are at. I have more gravitational potential energy sitting upstairs than I would downstairs. I have 'gained' this energy by converting chemical energy in my body to provide kinetic energy which in turn overcomes the force of gravity, enabling me to walk up the stairs. You 'gain' gravitiational potential energy in this process. I put 'gain' in apostrophies since energy isn't created, only converted from one form to the next. In this case: Chemical energy (stored in food) -> kinetic energy -> Gravitational potential energy. | V Heat energy from respiration (waste) That's what I was taught anyway. | Favourite Game Music | Last.fm | HYT Friend Chat Rules | Link to comment Share on other sites More sharing options...
aquariusman Posted September 5, 2008 Share Posted September 5, 2008 [hide=]Gravity works on the basis that the bigger an object, the more force pulling something to that object is. The bigger the object the stronger the force. Every object exerts this force, but for people it is extremely minimal. The earth, for example, has enough force to keep the atmosphere in check and the moon. The sun, has enough gravity to keep all 10 planets in check (they found a new one after Pluto, and I think the de-merited Pluto, but i'm not sure). That is the very basis of it. Of course, take Key Stage 4-5 Physics do get some really funky stuff. Apparently, in theory, gravity can warp time, and light, so if you built a machine which could exert masses of gravity, you could in theory warp time and light. That is supposedly how black holes work. They have such a strong gravity force that, even the light there supposed to produce, doesn't because the gravity is too strong, and...... :-#[/hide] Actually a black hole is typically a collapsed star, and has no dimensions, but incredible mass, giving it massive density. The gravity is so intense that the escape velocity (The speed you need to reach to escape the pull of gravity) is greater than the speed of light. However, gravity's force weakens over distance, so you get what is called an event horizon. The event horizon is basically a shell around the black hole. On the outer side, the escape velocity is less than the speed of light. Pass through the event horizon and light cannot escape. The event horizon is what actually gives the black hole it's name, since no light is able to escape, so no light comes out. Of course, we will probably never be able to approach the even horizon, because we can't reach any speed close to the speed of light. And the closer you go to a black hole, the greater the chance you will be ripped apart atom-by-atom in a process called spaghetification. There's no such thing as regret. A regret means you are unhappy with the person you are now,and if you're unhappy with the person you are, you change yourself. Thatregret will no longer be a regret, because it will help to form the new,better you. So really, a regret isn't a regret. It's experience. Link to comment Share on other sites More sharing options...
baalboy5 Posted September 5, 2008 Author Share Posted September 5, 2008 Just a little extra fact, gravitational energy is "negative" versus the "positive" mass and other forms of energy. It's been calculated that the total energy sum for the Universe comes to zero, since the positive mass energy cancels out with the negative gravitational energy. Overall, there is no energy in the Universe. Thats just sick. :shock: I didn't know such a thing could exist @ aqua Actually a black hole is typically a collapsed star, and has no dimensions, but incredible mass, giving it massive density. The gravity is so intense that the escape velocity (The speed you need to reach to escape the pull of gravity) is greater than the speed of light. How can it be greater then the speed of light? I though nothing could be faster. and how you know it's greater? Don't you know the first rule of MMO's? Anyone higher level than you has no life, and anyone lower than you is a noob. People in OT eat glass when they are bored. Link to comment Share on other sites More sharing options...
meol Posted September 5, 2008 Share Posted September 5, 2008 [...]How can it be greater then the speed of light? I though nothing could be faster. and how you know it's greater? Escape velocity is the one an object needs to "escape/break free" from the gravitational pull of a mass. For example, on the surface of the Earth, a rocket needs to achieve a velocity of 11 km/s to escape from the Earth. In a black hole, that velocity is over 300 000 km/s. Because nothing can be faster than light, you could assume nothing ever escapes a black hole. This signature is intentionally left blank. Link to comment Share on other sites More sharing options...
mmmcannibalism Posted September 5, 2008 Share Posted September 5, 2008 Just a little extra fact, gravitational energy is "negative" versus the "positive" mass and other forms of energy. It's been calculated that the total energy sum for the Universe comes to zero, since the positive mass energy cancels out with the negative gravitational energy. Overall, there is no energy in the Universe. just a thought on this assuming that to be true, that would strongly support the rubber band theory along with the thought that the universe has/will undergo an infinite series of big bangs forming expanding universes that eventually slow down retract into a single point which causes the next big bang and so on? edit--the escape velocity can exceed the speed of light because it just means that you would have to exceed the speed of light to escape, thus rendering it impossible without opening a wormhole or using a warp drive type device Orthodoxy is unconciousnessthe only ones who should kill are those who are prepared to be killed. Link to comment Share on other sites More sharing options...
silver_wits Posted September 5, 2008 Share Posted September 5, 2008 oh yea... what about negative matter? I can't remember if it's real or not.. [or if its still a theory] since we're going to talk about gravity and energy.. matter is important too... specially in the discussion of wormholes. :thumbsup: http://www.newscientist.com/article/mg1 ... rive-.html Link to comment Share on other sites More sharing options...
Lenticular_J Posted September 5, 2008 Share Posted September 5, 2008 My much simpler explanation: The universe is all for hugs. catch it now so you can like it before it went so mainstream Link to comment Share on other sites More sharing options...
Guest Posted September 5, 2008 Share Posted September 5, 2008 Whats at the end of the universe? A wall? and whates behind that wall? That, and gravity. Two "impossible" questions. Link to comment Share on other sites More sharing options...
baalboy5 Posted September 5, 2008 Author Share Posted September 5, 2008 Whats at the end of the universe? A wall? and whates behind that wall? That, and gravity. Two "impossible" questions. Universe is constantly expanding and some believe it will keep expanding or will eventually collapse on itself. Don't you know the first rule of MMO's? Anyone higher level than you has no life, and anyone lower than you is a noob. People in OT eat glass when they are bored. Link to comment Share on other sites More sharing options...
Guest Posted September 5, 2008 Share Posted September 5, 2008 Whats at the end of the universe? A wall? and whates behind that wall? That, and gravity. Two "impossible" questions. Universe is constantly expanding and some believe it will keep expanding or will eventually collapse on itself. Well, even if it is expanding, there has to be a wall at some point at the end. (say, its expanding at 500,000 MPS (miles per second), if you go 1,000,000 MPS you will eventully out-run it and there for hit the edge. Link to comment Share on other sites More sharing options...
DieselX Posted September 5, 2008 Share Posted September 5, 2008 "We say atoms are bound by weak attractors. Why not admit the truth: the Universe is held together by love." :twss: Link to comment Share on other sites More sharing options...
Nadril Posted September 5, 2008 Share Posted September 5, 2008 I don't believe in gravity. Link to comment Share on other sites More sharing options...
baalboy5 Posted September 5, 2008 Author Share Posted September 5, 2008 I don't believe in gravity. I don't believe you :twss: Don't you know the first rule of MMO's? Anyone higher level than you has no life, and anyone lower than you is a noob. People in OT eat glass when they are bored. Link to comment Share on other sites More sharing options...
Lenticular_J Posted September 5, 2008 Share Posted September 5, 2008 Universe is constantly expanding and some believe it will keep expanding or will eventually collapse on itself. We don't know that. That's just a common theory that holds a tiny bit more evidence. I once followed the idea of Nadril. If you didn't believe in gravity, it would be gone. Oh, wait, I still do. See you guys 200 feet in the air! :twss: catch it now so you can like it before it went so mainstream Link to comment Share on other sites More sharing options...
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