Why is there gravity?

Answer 1

Because there's mass.

Why is there mass?

Dunno.

Answer 2

There isn't really a way to answer that question without using gravity as part of the explanation. I've read somewhere that the build up of mass causes a strain in space-time and that gravity is the result of that strain, however no one really knows. Gravity is one of the most confusing forces in the universe. Its the weakest force yet it has the greatest area of effect.

The tiers of forces in the universe goes like this: (1-strongest)
1) Strong Nuclear Force -holds nucleus of atoms together.
2) Electro-magnetic
3) Weak Nuclear Force -determines whether a particle will be a proton, neutron, or electron.
4) Gravity
(For more info on the forces of the universe go here http://www.foge.org/lesson_plans/materials/spacescience_07a.pdf)

Answer 3

Your dillemma is not what cause gravity but rather why gravity Exist.
First we must define gravity. Gravity is a sphenomena reponsible for all forces in the Universe. It applies to electric phenomena as well as the magnetic phenomena.
Gravity hold all masses in the Universe together into a structure. Therefore the reason for gravity is that it holds your body in the shape you have ,and hold the Earth the Moon the Sun and all celestial bodies into a structure and shape which forms their architecture.
Without gravity there would be no magnetism ,no electrical Phenomena and nothing would hold together. Gravity is a phenomena of space structure.
Humans which are made of mass structure would not exist in the status quo shape and structure, if gravity phenomena did not exist.Time itself would always remains the same as infinite ,without the continually changing gravity field levels.
With Gravity, time in the volume of the Universe has different shell levels.

Answer 4

Gravity is a force of attraction between any two masses that is proportional to their masses and inversely proportional to the square of the distance between them.

The actual phenomenon behind the force of gravity is somewhat less understood. The theory of relativity tries to address gravitation but there are some inconsistencies. Quantum theory address gravity by the use of virtual gravitons as a concept which works fairly well except across very, very small distances.

Answer 5

There is gravity due to mass between objects in curved space. You should check out Stephen Hawkings Universe in a Nut Shell. It will open your eyes to Physics and the Universe.

Answer 6

Gravity exists just because it does... Whenever you have two bodies with an especific mass there's gravity... Just a force of attraction between them. The magnitud of this force depends on the amount of mass the bodies have and the distance between them, and others factors as well...

Answer 7

there is gravity due to the deformation of space.
When mass is present it disturbs space dimensions, however gravity is a very weak force and gravity is only noticeable to us, with objects that have a very high mass such as the sun and the planets

Answer 8

It's a law of physics, Henry. there is an attractive force between masses, a small mass will move toward a large mass.

Answer 9

We really, honestly, don't know. We can measure it and predict it. We know its properties. But we don't know why it happens. The general relativity view that spacetime is warped in the presence of mass still has no explanation for why that is true. Nor do we know the reasons for the other fundamental forces.

Answer 10

newton figured out the how.
einstein figured out the why.

according to the theory of general relativity, you can think of space and time as one, 4-dimensional unit. the presence of any object with mass distorts space-time, and that distortion appears to us as gravity.

imagine a trampoline. if nothing is on it, it's flat. now roll a small ball on the surface of the trampoline. it goes in a straight line.
now put a bowling ball in the middle of it. the middle of the trampoline caves in a little bit due to the weight, and distorts the flatness of the trampoline. roll that same small ball. it will not go straight, but due to the curvature on the surface of the trampoline, it will travel in a curve, heading towards the weight in the center. if you roll the ball in just the right way, it will go around and around until friction slows it down, then it will go into the middle. but the ball itself just wants to go straight. its straight path is distorted and turned into a curve because of the distortion in the trampoline due to the bowling ball.

it's the same exact thing with gravity, except instead of a flat, 2D surface being curved into 3D space, it's 3D space being curved into 4D spacetime.

Answer 11

Gravity!

Not just a good idea. It's the LAW!