Why is Gravitational force only on Earth?
819820
Gravity is everwhere but less or more, depends on the matter.
921188
What is the question?  Earth's gravity is a huge subject, best answered with some existing web sites.  I would read the sources below first.
618522
Yes, a gravitational field can and does exist within other gravitational fields.  All masses in the universe exert an attractive force on all other masses in the universe through a force known as gravity.  Gravity is a vector quantity meaning it has a direction.  These forces act in different directions and cancel each other out. To keep from getting too technical take this example.\nYou are standing on the surface of the Earth, within its gravitational field.  The Earth attracts you to its surface because of the force known as gravity. You, having mass, also exert a force of attraction on the Earth. The reason you do not notice your attractive force on the Earth is that the earth's mass is so much larger than your own. The earth acts a force in one direction, you act a force in the opposite, the result is the net force in the system.(You bening pulled toward the larger mass, Earth)\nThis can be proven mathematically with the formula \nFg=[G(me)(m)]/d^2\n\nG being the gravitational constant, multiplied by me, representing the mass of the earth, and multiplied by m, representing your mass, divided by the distance between you and the earth's center of gravity squared.
911261
well, we know that F = ma, and with gravity, F = mg\n\nWhat causes this force? gravitational attraction, which is defined by:\n\nF = Gm1m2/r^2\n\nSo, we can say that mg=Gm1m2/r^2, where r is the distance between 2 objects (1 and 2).\n\nnow, lets solve it for g\n\ng=Gm/r^2\n\nthis shows us that g varies inversely with the SQUARE of the distance.  So the distance between the earth and an object would need to be r*(sqrt2)
1064813
every one is wrong except one guy it cuz of centriptal force if u want to get in detail here it is   consider earth rotating along its axis gravity is acting along centre any force acting  opposite to it will reduse its effect   take a body on equator as earth is rotating body will have a force acting opposite to tat of gravity it is same as on feel in car when it is taking turn out side right  but when body is at pole it wont have tat force cuz pole is on the axis imagine whole situation  magnetic force wont have ny effect
842967
Gravity is a condition of the space-time continuum which is associated with mass.  Every object which has a mass will have a gravitational attraction to any other close object with a mass.\n\nThe planet Earth has a mass, and therefore has a "gravity."
4566
The Earth as a whole can be considered a single mass, m1 and another object, for example you, or the moon, or an apple, is considered another mass, m2. The gravity force between them is given as:\n\nF = G*[(m1*m2)/r^2]\n\nWhere G is the Gravitational constant and is equal to:\n6.67x10^-11 N m^2/kg^2\n\nSo the root cause of the Earth's gravity is it's mass and how it pulls on other masses as given by the equation above. \n\nYou can see that with two very massive objects like the Earth and the Sun you get a much bigger force than with smaller masses like 2 people. THat's why the Earth is kept in orbit about the Sun but you don't feel a force pulling you towards other people for example.
1165783
It is wrong to say that there is no gravity in space. This is why you hear astronauts use the term "microgravity".\n\nGravity is a property of mass. All objects have mass and thus attract other objects with mass. It takes a lot of mass for this effect to be noticable. Here on Earth, the Earth is massive enough that we notice it! Gravity holds us too the Earth. The farther you go from the center of the Earth, the weaker the gravity becomes. For example, the pull of gravity is slighty slightly weaker on Mt. Everest than it is at the beach.\n\nYou'd have to go very far into space for this pull to become half as strong as it is here on Earth. \n\nThe reason astronauts and other things in orbit float is because they are in a perpetual state of free fall do to the fact that the Earth is curved and they are traveling around it at such great speeds that for every foot they fall towards the ground, they move over the horizon just enough that the ground doesn't have a chance to get closer. If the astronauts remained stationary over one point on Earth then they would fall to the ground.\n\nThis is true for anything in any stable orbit. If the Earth were to stop moving around the sun for some reason, it'd fall into the sun.\n\nThere ARE points in space where we can say gravity due to the net force of two or more objects is zero. If you were traveling between the Earth and Moon, or the Earth and Mars, or any two massive celestial bodies, you will find a point where the pull from one body is equal and opposite to the pull from the other body. This is like a balancing point. A little closer to the Moon and that becomes the object which you're falling towards, and a little closer to Earth and that becomes the object which you're falling towards.\n\nThere is also theoretically a distance in space where you could be so far away from anything that the pull of gravity on you is negligable....but not zero.\n\nSo in space you are actually always falling towards something. Comets enering the solar system are ultimately falling towards the sun. The astronauts are falling towards Earth without actually getting any closer, the Earth is falling towards the sun without getting any closdr, the sun is falling towards the center of the galaxy without getting any closer. \n\nI hope you get the idea.
766573
Gravity is the force that pulls things on to Earth.\nWeight is how heavy something is.\nThey are related because gravity pulls down weight on to the Earth. \nhope this helps!
129944
Don't worry, this will never happen. The "gravity" of the earth is actually caused by attraction between two objects of significant mass.  Were the gravitational force of the earth to vanish, that would mean that the earth itself had vanished.  It would also mean that you would be in free-fall, expereincing what might appear to be weightlessness.  not that this would matter considering that you would be in the void of space and would be dead.
303004
I've just read that the gravity on the sun is 28 times greater than the Earth.\n\nIt is gravity that keeps satellites and space stations in an orbit around the Earth, at least if that orbit does not intersect the Earth, because then they would crash, and if that orbit isn't too low above the Earth, because then they'd be slowed down by friction with the outermost layers of the atmosphere of the Earth, and then they'd fall down after all. Gravity also keeps the Moon in its orbit around the Earth, and the Earth and the other planets and comets and asteroids in an orbit around the Sun, and the Sun in an orbit around the centre of the Milky Way Galaxy.
1132052
Gravitation and gravity are the same thing.  Gravity is one of the four fundamental forces, so yes, gravitation is a force.
217239
There is no such thing as centrifugal force, it is an illusion. The only force acting upon the earth is gravity. As you can see, there is absolutely no balance to the forces, just one force acting towards to centre of mass of the earth/sun system. (I'm ignoring other gravitational forces, such as that of the moon and other planets).\n\nNow you seem to have a little bit of a misunderstanding about what forces do. A system with balanced forces does not have to be stationary. Forces cause acceleration. Therefore if something is moving with constant velocity then it has no resultant force acting on it (forces are balanced).\n\nSince the earth only has one force acting on it (centripetal force, towards the sun) then the earth is constantly accelerating towards the sun. Because the earth has a tangential component to it's velocity (that is not affected whatsoever by the centripetal force because it is at right angles to it) it orbits the sun.
677265
The Earth and our body exert forces on each other according to Newton's law of gravity.  Essentially mass attracts other mass.
404666
By the pull of earth's gravity
1170472
You've got a couple of strange answers so far.  Look, the formula written above is correct, the mass of the earth is basically the same, but the mass of your surroundings isn't the same.  The pull of gravity is less the higher your elevation, greater the lower the altitude.  If you're on land with higher density, you'll have a greater pull then on land with a lower density.  Pretty much everywhere on land gravity isn't even, out in the middle of the ocean, it's very close to even.  But, keep in mind, these differences are pretty much negligible.  The only way to be able to measure the difference is with scientific equipment.  Actually, it's common practice to measure gravitational anomalies under ice sheets to gleam information about the formations underneath.
614445
I doubt it.\n\nAssume that gravity force is a vector.  These vectors leave the earth radially and extend through out the universe. imagine you will make a car that cancels these vectors.  Then every where you drive there will be no gravity above the car as well.  This would be quite bad for the rest of us because all the air in a column above your car would now escape into the atmosphere.  Since escape velocity would only need to be above zero.  While you are driving around draining the atmosphere into space stop and think maybe a satellite is above you and it doesn't want to be removed from its present orbit.  So you best not drive under it or satellite TV subscribers, telephone, comm-systems  and a bunch of other will be quite perturbed.  \n\nDon't count on it.