What is gravitation ?

Question

Everybody feel the gravitation and we can messure it but what exact does it consist of ?

We know that masses have influnses on each other, that is gravitation, but what information is transferred between those masses that produce the gravity ?

Is it possible that an expanding universe could induce gravitation analogous to the forces on the surface of an expanding baloon ?

Answer 1

Short Answer: Gravity is the distortion of space time created by matter, that results in objects moving toward one another to acheive the most energy efficient relative configuration. This force is subjectively felt by men to be a force pulling one body towards another.

Newton believed that gravitation was an innevitable attraction between two bodies, that was dependent upon their mass, density and distance between bodies.

Einstein postulated that Gravity was the distortion in space time that was caused by matter. His laws explaining it end up working much like Newtons for most situations, but also explain several other phenomenon.

In the past 30 years the study of gravity has revealed some other peculiarities where certain celestial bodies don't quite behave as they "should" as described by Einsteins relativistiv view of gravity. This phenomenon was that stars seemed to orbit the center of a galaxy in a way that was counterintuitive. The starts closest to the core moved fast, and we expected that as you got further from the core the bodies would move slower and slower... which was true up to a certain point, but then failed to be true after that.

To explain this phenomenon physicists postulated the existence of a kind of Dark Matter, that acts like regular matter as far as gravity is concerned, but that neither reflects or gives off light. With Dark Matter, Einstein's theories are sound.

An alternative theory is now gaining momentum, that describes gravity having an additional property not considered by Einstein, but that doesn't completely refute his view of what Gravity actually is. This theory is abbreviated MOND I believe.


Tiger Striped Dog MD

Answer 2

The word gravitation stem from latin derivation which means=Heavy or weight.
Weight is measure relative to sea level elevation at an average radius of the earth. Wheight is a measure of force. when we weight on a scale (balance scale) we are realy measuring mass.
Scales have been used ions before Newton was born.
Hence Human can sense gravity but dont particularly think of what it consists of.
Till to day you will find that theories that give a mechanism of gravitation a very few and an extremely esoteric knowlegde if any.
Newton gave a formula for gravitation force(gravity interaction between two masses),a formula still used today ieven en calculating parameters for the Astronots moving into space.

General relativity gave explanation to what happens in the field of space in therms of its curvature in the presence of a mass structure.The formula is called the Field Equation.
However General Relativity gave no mechanism for gravitation.

If you come up with the right answer for this question you may have a Nobel Prize winner.

Answer 3

See if there are two magnets are present then they will either attract or else they repel. This is caused by the force between the two magnets when they are charged.

In the same way gravitation is a force that pulls the body towards the centre of the earth. Now I think you know that every body have a tendancy to attract the other body (with a force known as force of attraction). But in the case of Earth and any object system, as the Earth has huge mass compared to the object. So it attracts the object. This is called Gravitational Force.

This concept is introduced by Newton and for more information, see this link

http://en.wikipedia.org/wiki/Newton%27s_law_of_universal_gravitation

Hope you like this.

Answer 4

It is important to note, in some contexts, that gravitation is not gravity, per se. Gravitation is a phenomenon independent of any particular cause. Some theorize that it is possible for gravitation to exist without a force; according to general relativity, that is indeed the case. In common usage "gravity" and "gravitation" are either used interchangeably, or the distinction is sometimes made that "gravity" is specifically the attractive force of the earth, while "gravitation" is the general property of mutual attraction between bodies of matter. In technical usage, "gravitation" is the tendency of bodies to accelerate towards one another, and "gravity" is the force that some theories use to explain this acceleration.

Answer 5

i will simplify things.take a ball and drop on some freely hanging net.the ball will make the net bulge at bottom.
so any mass or matter in space has some tendency to curve the space around them.as a result the other bodies are pulled towards them,just like a whirlpool in sea.
so the greater the mass the greater is the pull.