What cause a mass of matter to pull another mass of a matter?Gravitation is an effect , what is the cause?

Question

One mass of amatter always attracts each other and never repells. Why it happens so.?If there is no probability of repelling each other then is it mathematically established or not. Charged bodies repell each other when they are of same charge or of same polarity may be for resisting more build up at the same point. Opposite cgarges may attarct each other to neutralize for more stability & less build up. I imagine gravitational power may be affected by the speed or rotational speed,Is there any mathematical limitation against this imagination. In case of subatomic particle mass is velocity dependent.

Answer 1

According to Einstein, Gravity is not a result of a "mysterious force acting over a distance." The presence of any mass actually distorts space and time itself subtly, causing any two objects to tend to be accelerated towards each other. In essence, space and time becomes "curved." This helps explain the observation that very large masses (such as galaxies ) can actually bend the path of light rays, even though light itself has no mass. http://antwrp.gsfc.nasa.gov/apod/ap070311.html
As to the actual reason "why" matter does this; I can only speculate.

Another odd prediction of Einstein, is that if an object has a great enough density, the distortion of space and time will become so severe that the the acceleration due to gravity approaches the speed of light. Thus space and time seem to vanish entirely near the object, and the object itself collapses into void, a so called "black hole." A point where the ordinary laws of nature seem to no longer apply.
http://en.wikipedia.org/wiki/Black_hole

Einstein also theorized that other fundamental "forces" such as electromagnetism, and the nuclear forces, might be the result of similar distortions of space-time. However, Einstein's gravity and relativity do not seem to apply well to the world of subatomic particles, probably the most important unsolved problem in Physics. There is some evidence to suggest that this is true, for example, extremely intense laser beams seem to temporarily slow the speed of neutrons, which have no charge and should not be affected by light.

Answer 2

Hello chaitanya, a rather very Good Ques.
Physicists have long been in query of understanding, what actually this GRAVITATION is ? I 'd like to ans. in points :
1. The first ever attempt was made by Sir Issac Newton ( as u may well know - The falling apple story)
2. The theory Of UNIVERSAL GRAVITATION acquired world acclaim and soon was accepted.
3. Neither the science, nor the requirement existed then to go deep to the mechanism of this force. By today, in the era of THE GRAND UNIFIED THEORY or concepts like : String, Superstring, Super symetry or Membrane theory... we are bound to poke into the working and nature of all the 4 fundamental foces of nature.
4. Here came Sir Albert Einstein to rescue with His General Relativity. He proposed that the SPACE-TIME is a sheet which is bent by mass causing the vicinity bodies to slide in (just to explain you simply)
5. Today we have another aproach to this, thanx to QUANTUM MECHANICs. It suggests that as other forces occur dur to the exchange of some ForcE CarrieR particles, Gravitation too is the same. Its due to the exchange of certain force carrier particles, called, Gluons. Their existence is yet to be prooved by the particle physicists. Lets see whether some or the other of those Giant Particle Acelerators are able to detect it.
6. Lastly, we have another way to think ( if you are in the world of Superstrings ). It sugests that Gravity ( the weakest one of the 4 forces ) is actually "leaking" from "other Universes"(these may have as many as 11-21 dimensions) and reaching our 4-dimensional world.

Well hope that one day, as we have already controlled forces like "electromagnetism", we 'd also be able to develop or modify Gravitation with our own will. Hope tomorrow we can develop some capacitors which can make us feel weightless whenever and wherever we want.

Bye...........

Answer 3

What you have asked is germain to why there is a field of gravity at all. It is similar to seeing an automobile moving down the road and wondering why it moves. The answer to the automobile is that it takes both a particular form of energy as well as a manner by which it is converted into useful motion. The same is found concerning a field of gravity. In that it exists, and is continuously performing work, there must be an energy source providing that energy. If this were not true, the force of gravity would be that of a field of perpetual motion or of perpetual creation. Stephen Hawking in “A Brief History of Time,” page 92, paragraph 3, states; “Like light, gravitational waves carry energy away from the objects that emit them.” In order to have the potential energy to be carried away, there must first exist the potential energy.

In the physics trilogy: E = mc2, m = E/c2, and c2 = E/m we find the relationship stated in the last equation. As the energy (E) is increased, so is the field of gravity. As the mass is increased, the field of gravity decreases. Were our planet to have no heat energy within (E), then it would have no gravitational field. It is not the (E) that equates to the automobile. That condition would be found in the shape of individual atoms and what the (E) does to them in order for individual waves to form.

http://360.yahoo.com/noddarc there is a short writing "How to Form and Collapse a Gravitational Field" You will find it by finding "list view" and scrolling down.

Answer 4

Gravity is geometry! The space time is like a bed sheet. When something rotates(or something is on it), it "wraps" the space time bed sheet. (Try putting a stone on a bed sheet, it will curve inwards and "pull"nearby objects towards it). That's why we observe gravitational effects.
Yes there is a limit to rotational speed; the rotational speed may never be greater than speed of light.

Answer 5

General Relativity says that spacetime is warped in the presence of mass. This still doesn't help explain why it happens or why it is only attractive, never repulsive. We really have no idea why. Gravity is not affected by rotational speed.

Answer 6

A coherently stated question would probably help...