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Why do we never see tables, watermelons, or people attracting one another? Because for small objects the force of attraction is exceedingly small. Here is a graphic instance. Two persons at a distance of two meters apart do pull at each other. But the force exerted is minute, being under 0.01 mg for people of average weight. In other words, two persons pull at each other with the same force that a 0.00001-gram weight exerts on the scale pan. Only the extremely sensitive type of scales that scientists use in their laboratories will be able to register such a tiny weight. It goes without saying that this force will never affect us, being completely offset by the friction between our soles and the floor. To push a person standing on a wooden floor- where the friction between the soles and the floor is equivalent to 30 percent of his weight- you must exert a force of at least 20 Kg. And to compare that with the negligible pull of the hundredth of a milligram is simply ridiculous. A milligram is a thousandth of a gram; a gram is a thousandth of a kilogram, consequently 0.01 mg is exactly half of a thousand millionth of a force needed to pull a person away. Small wonder that in ordinary circumstances we never notice the mutual attraction that exists between objects.
But if friction were nonexistent, there would be nothing to prevent even the faintest of pulls from bringing bodies together. In our case of a force of 0.01 mg, however, the speed with which the two persons, 2 meters apart, would draw closer to each other by 3 cm in the first hour, by 9 cm in the next hour, and 15 cm in the third hour; as you see, speed increases, the closer the two draw together, nevertheless it would take another five hours before the two persons would be drawn together.
Gravity is evident in cases when friction presents no obstacles, or, in other words, in the case of bodies at rest. It will act on a weight hanging on a piece of thread, causing it to dangle vertically down. However should there be some massive object nearby, it will pull the weight towards itself, making the thread deviate slightly from the vertical in the direction of the resultant between gravity and the pull of the massive object.
This was first observed by Maskelyne in 1775 near a bug mountain in Scotland. He compared the deflection of the plumb line with the direction towards the celestial pole on either side of the mountain. Subsequent more elaborate experiments conducted with the aid of specially devised scales, enabled scientists accurately to gauge the force of gravity.
The force of attraction between small masses is negligible. As the mass increases, so does the force of attraction increases accordingly, in direct proportion to their product. Many, are prone to exaggerate this force. A person, not a physicist tried to assure that the frequently observed mutual attraction between the ships at sea was a result of gravitation. However, it is easily reckoned that the gravitation has no role in it. Two 25,000-ton battleships will attract each other with a force of only 400g, when they are 100 meters apart. This is naturally too little for the ships to move. The reason for this attraction is entirely different.
Though negligible in the case of small masses, gravitation proves to be quite a force when we have to do with the colossal masses of the celestial objects. Even the distant planet of Neptune, right out on the rim of the solar system attracts the earth towards itself with a force of 18 million tons. Despite the tremendous distance between the sun, and us it is only the gravitation that keeps the earth from straying off its orbit. Were the sun to cease its attraction, this planet of ours would dash off at a tangent to its orbit to race headlong into the infinite reaches of space.
What else can I help you with?
Is there gravity in a vacuum?
Yes, there is still gravity in a vacuum. Gravity is a fundamental force that exists everywhere in the universe, including in a vacuum where there is no air or matter.
Were else can you find gravity but earth?
Yes. Gravity exists everywhere in the universe as all objects have a gravitational pull. Objects in space do not seem weightless because there is no gravity. Rather they seem weightless because they are in freefall.
Why the law of gravity same everywhere?
The law of gravity is the same everywhere because it is a fundamental force of nature that acts uniformly on all objects with mass. This consistency across the universe is a reflection of the underlying nature of space and time as described by the principles of physics.
What forces affect gravity?
The main force affecting gravity is the mass of the two objects involved. The distance between the objects also plays a role, where gravity weakens with increasing distance. Gravitational forces can also be influenced by other factors, such as acceleration and the presence of other objects in the vicinity.
What there is no gravity at the .?
center of earth
0 gravity in this case meaning not under the effect of gravity from any source. Does 0 gravity exist?
There are likely places in the universe where there is very little gravity, but it is probably impossible for no gravity to exist somewhere. There is very probably gravitational influence just about everywhere.
Is there anywhere on earth without gravity?
Gravity is everywhere in the universe. There's no getting away from it, anywhere.
Does the force of gravity not exist in some prts of Wisconsin?
No, It exist everywhere, but it does very.
Does gravity exist on earth?
Gravity exists everywhere that mass exists, so the answer is yes.
Where is gravity found?
Gravity is a natural force that exists everywhere in the universe. It is what keeps planets in orbit around the sun and objects on Earth from floating into space. Gravity is always present, whether you are on the Earth, in space, or on another celestial body.
Is there gravity in a vacuum?
Yes, there is still gravity in a vacuum. Gravity is a fundamental force that exists everywhere in the universe, including in a vacuum where there is no air or matter.
Is there gravity on all of the planets?
There is gravity everywhere in the universe. It attracts every speck of mass to every other speck of mass.
Is there gravity in India?
There is gravity everywhere in the universe. So, if India is somewhere in the universe, then there is gravity there. This is a big part of the reason that people in India are able to walk around during the day, and stay on their beds during the night.
Where else is there gravity besides earth?
There is gravity everywhere in Creation. It causes a force between every two bits of mass in the universe.
What evidence do you have for gravity existing?
You would float away if it didn't exist, futhermore the universe wouldn't exist. AND you can measure it
Where does gravity exists?
Gravity exists everywhere in the universe, acting as a force of attraction between all objects with mass. It is what holds planets in orbit around the sun and keeps our feet on the ground on Earth. Gravity's strength diminishes with distance, following the inverse square law.
Why isn't there gravity on the moon?
There's gravity everywhere in the universe, including on the Moon. Because of the way gravity works, if you go to the moon, your weight when you're there will be about 16% of what it is on Earth.
