2006-09-07 22:31:17 · 37 answers · asked by tinkerbell 4 in Science & Mathematics ➔ Earth Sciences & Geology
It's all about spinning. Take a bucket full of water and spin around. It stays in the bottom of the bucket. That's how you can create gravity. Then try tipping the bucket upsidedown on your head as this is how you create refresment.
2006-09-07 23:31:32 · answer #1 · answered by Big Hands 2 · 0⤊ 3⤋
I'm surprised at some of the answers which I believe are just plain wrong.
The force of gravity was created or "came from" the initial big bang that created the universe. According to Physics, the laws of this universe such as gravity were "born" within the first second of the big bang.
Gravity does not come from the rotation of the earth. My understanding of Physics is that the strength of gravity between two objects depends only on their mass and the distance between them. This force of attraction can be calculated if you know the gravitational constant (G). The formula is G x m1 x m2 / d^2
Since the earth has a lot of mass, we can feel its effect and do not sense any gravitational "attraction" when standing next to someone. The moon has about six times less mass and hence the gravity there is six times smaller.
The gravitational constant is a very precise number that is required for this universe to work (miracle?). A little bit too big and the universe crunches together, a bit smaller and we literally fall apart.
As to where it comes from, I think this is more of a philosophical question without an answer (under a gooseberry bush perhaps?).
2006-09-07 23:06:49 · answer #2 · answered by Nothing to say? 3 · 0⤊ 0⤋
I think many of the above answers are good, the displacement and warping of time are good examples. I believe, just from inference that the universe is either, or acts as a closed fluid system, whereby the addition of things with mass cause the static equilibrium or pressure of the entire thing to be unequal. Like forcing ball bearings into a sealed spherical 'jar' of a compressible fluid. The 'energy' is contained within the fluid and bearings, and the actual pressures in specific areas are dependent upon the locations of the bearings now, and their positions relative to each other, with the pressures being lower in the areas between them, and higher in all other places and directions. This, if true, would exert a force upon the bearings toward one another. I think this is what is happening on a cosmic scale, with space itself being the 'dark energy' that is postulated and sought. The universe is apparently a known quantity, with the total amount of energy and matter being constant or interchangable, but conserved. Gravity I think is the universes attempt to maintain or reach equilibrium which never will happen. The expansion of the universe is a different animal I would think, In an unexpanding universe the fluid dynamics things makes sense to me, but the expansion seems to have started or slows and accelerates by some other unknown method, and the massive energies to inflate the whole universe are something I cannot fathom or understand where the energies come come.
2015-03-10 02:28:59 · answer #3 · answered by shali 1 · 0⤊ 0⤋
Oh how sad the state of science education is... not you the asker, it is a sensible question, but some of the answers! The rotation of the Earth! I ask you.
WHAT gravity is, is well understood, all mass in the universe is attracted, weakly to all other mass in the universe, by the square of the distance between the masses. Your mass is attracted to the center of Earth's mass and vice versa, that's why you don't fall off, and why its an effort to get up out of bed i.e. to move away from the centre of the Earth.
Gravity is one of the 'weak' forces that exist in our universe, magnetic attraction is another. The 'strong' forces are those that hold the parts of atoms together like the protons and neutrons in the nucleus.
What isn't understood is HOW two bodies in the universe, for instance the you and the Earth, excert their gravitational pull on each other. We don't know what the mechanism is: what are you and the Earth doing to each other that makes you stick together? Are you exchanging particles (gravitrons)? Are you bending the shape of the universe in someway so that you fall into a space time 'well' together?
If you are very intersted in this I recommend Stephen Hawkings 'A Brief History of Time' he knows far more about this than I ever will :)
2006-09-07 23:06:14 · answer #4 · answered by SmartBlonde 3 · 2⤊ 0⤋
Gravity is the quantifiable molecular force that is created by anything that contains mass. The more mass, the more gravity or "force" that exists. That is why the moon has less gravity than the earth, because if has 1/6th the mass of earth, therefore it has 1/6th the gravity.
2006-09-07 22:36:58 · answer #5 · answered by Anonymous · 3⤊ 0⤋
It doesn't come from anywhere, It's one of the forces that rule the universe. Every thing with mass in the universe has it's own gravity. The more mass the object has, the bigger the gravitational force.
Einstein told us that gravity distorts space-time
The rotation of the Earth has nothing to do with gravity!!
2006-09-07 22:32:59 · answer #6 · answered by BadShopper 4 · 2⤊ 0⤋
Einstein said that the mass of an object causes curvature in space-time (the two are not separate). Books tend to explain this along the lines of:- space-time is a trampoline, a planet (for example) is a snooker ball. The ball causes a divot in the trampoline. An object moving around the ball would be drawn towards it because of this indent - that is gravity.
2006-09-07 22:47:14 · answer #7 · answered by Silkie1 4 · 1⤊ 0⤋
It comes from the mass, but it is difficult to observe on earth since earth mass introduces the strongest gravity other than any object on it.
Other force can be also considered as gravity if it pulls object to its center of mass. This thing is called sometimes as artificial gravity.
2006-09-07 22:42:26 · answer #8 · answered by N/A 2 · 2⤊ 1⤋
Bwetween two or more things that are nearer to one another there is a force of attraction between them this force increases as the distance dicreases. the force of attraction also is equal to the product of the mass of the two bodies that are nearer to one another.
The gravity of the earth is real the product of the mass of the earth to our bodies that is since we are nearer to the earth we are said to be pulled to the earth's center because we are lighter than the mass of the earth this force of attraction real decreases as we move from the earth's surface going to the spase that is why the astronouts when in space they don't experience the gravity.
2006-09-07 22:43:11 · answer #9 · answered by mtula ikufa 2 · 2⤊ 0⤋
it doesn't come from anywhere... Gravity is the attractive force of any 2 masses... you have gravity, I have gravity and so does my pen, my desk and so on..... it is just that the bigger the mass the greater the pull of it's gravity so you don'#t really feel it unless you are tlaking about a planetary body.
2006-09-07 22:41:15 · answer #10 · answered by break 5 · 2⤊ 0⤋
Gravity is created by the displacement & warping of time/space by the mass of an object.
2006-09-07 22:44:50 · answer #11 · answered by Anonymous · 3⤊ 0⤋