what is the point of gravity and why do we have gravity, and space doesnt?

Answer 1

The pull of gravity is directly proportional to the mass of the objects, but inversely proportion to the square of the distance. So, the farther apart two objects are, the weaker is the gravitational attraction between them. You are not totally free of gravity in space. The reason an object can be put into orbit is the balance between its speed and the pull of gravity on it. But the farther you get from the earth, the weaker the effect of earth's gravity becomes. And in far distant outer space, far away from any large object, the gravitational pull of any of those objects would be negligible.

Answer 2

There really is no point of gravity, it is just a law of physics that occurs naturally in nature. Its like asking why does the sun shine. Gravity has a purpose as it helps shape the universe, galaxies, solar systems, and such. But to answer what is it's point, well thats a more philosophical question than a scientific.

All matter has gravity, including yourself and the little ants crawling in your back yard. Gravity's influence is found all throughout space. The suns gravitational influence extends about 2 - 2.5 light years out, after that the next nearest star's (The Centauri System) gravity will take precedent.

There are even grivity's quantum particles, the gravitron, distributed all throughout space.

Hope this helps,

-TF

Answer 3

first of all i must say that gravity is one of the wekiest forces there is, for example if you jump from the top of a tall building it take a long time to get to the bottom but the other forces in the concreat floor are able to stop you instantly. that one gets the brain cells working.

i dont think there is an answer to this question as im pretty sure that noone realy knows how and why gravity came about. and space tecnically does not have gravity as the definition of space is clearly that its empty space, however everything know to man has a gravitational pull including the sun and earth, that what stops us orbating the sun and not drifting off. its again not known how these forces attract.

you answer is there currently is no point to it its just there. again not sure why everythign has gravety but it just does and finally space does not have its own gravity, the objects in space do but not space.

Answer 4

Wow. The range of answers on this page is amazing. Some folks really don't understand gravity, and others are clearly physics majors or physics buffs.

Hint: Listen to the ones who say that space DOES have gravity -- in fact, even if you were the only mass in the universe, you'd still be generating your own personal gravity. (Anyone who says or appears to believe that there is no gravity in space isn't giving you a good answer. They're just guessing.)

Answer 5

Gravity is really the centrifugal force created by the rotation of the earth around its axis. It tries to pull everything in. Gravity helps in everything and everyone stay put, otherwise everything would fly off into space. There is a limit as to how far the effect of gravity can extend. At some point the gravity becomes very minimal. The larger the object and the fastrer the spin the more gravity. Space doesn't rotate or spin, so there is no gravity. All planetary bodies or galatic bodies or stellar bodies have gravity.

Answer 6

gravity does really have a point, just like thick people or women dont really have a point. they just exist.

gravity is the force between two objects with non zero mass. 'space' doesnt have gravity because it has no mass. thats not to say that gravity cannot be felt in space. if this was the case, the earth wouldnt orbit the sun, the moon wouldnt orbit the earth.....etc

the formula for the gravitational force between two objects with masses m1, m2 is :-

F=G x m1 x m2/(d^2)

where G = gravitational constant

d = distance between the two objects centre of mass.

since this formula cannot equal zero, the force of gravity between two objects exists no matter how far apart they are.

I.E. GRAVITY IS ALWAYS THERE

Answer 7

Gravity is the RESULT of mass. The more mass, the more gravity. It is inacurate to say ther is no gravity in space, seeing as for instance, our nearest large neighbor- The Andromeda Galaxy and our Galaxy (The Milky Way) are in a graviatational tug of war. It is estimated that with in 100 Billion years, our two galaxies will collide in a cataclysmic merger. Which shows gravity exists everywhere in the unverse there is matter. We have black holes, quasars, neutron stars and all of our stellar neighbors all linked gravitationally in one form or another.

Answer 8

Newton was the first to address "what is Gravity." In a sense, at least. Newton came up with an incredibly simple law/observation about Gravity, which we now know as "Newton's Universal Law Of Gravitation." Simply put,

All mass exerts an "action at a distance" force on each other, proportional to the product of the masses, and inversely proportional to the square of the distance they are separated.

Einstein later modified Newton's law and came up with a deeper understanding of "what is Gravity." In Einstein's theory, mass, energy, space, and time interact in a certain way to produce what we perceive as the force of Gravity. That is,

Space-time is "warped" by the presence of mass and energy. This simple! Well, it is this simple in principal. However, this statement is then formulated in very specific Mathematical structures called Tensors. In fact, a special Tensor called the "Einstein Curvature Tensor" (let's call it Guv) is set equal to the "Mass-Energy Density" Tensor (let's call it Tuv).

Guv = k*Tuv

Guv is a Tensor that expresses the curvature of Space-time. Hence, this simple equation says,

The Curvature of Space-time is proportional to its Mass-Energy content. The force of Gravity, in Einstein's view, is caused by our motion in curved Space-time.

By the way, Einstein's theory completely incorporates (reduces to) Newton's Universal Law of Gravitation, for all but the most extreme situations.

Answer 9

well actualy there is no such thing as any place that does not have gravity in the physicial totality. what you do have is a zero balance points. where the pulling forces of gravities are nulifying each other. and if it wern't for gravity, it would make it difficult to stay on any planet or have air to breath and a way to collect water to drink, plant crops, making it impossible for physicial live bodies to exist.

Answer 10

Gravity is a function of mass. We're talking basic physics here.