difference between gravity and gravitation?
- KarishmaLv 41 decade agoFavourite answer
The terms gravity and gravitation are often used to explain the same thing, but there is a definite difference between the two.
Gravitation is the attractive force existing between any two objects that have mass. The force of gravitation pulls objects together.
Gravity is the gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.
Since gravitational force is happening to all matter (objects) in the universe, from the largest galaxies down to the smallest atoms, it is often called universal gravitation. Sir Isaac Newton was the first to fully recognize that the force holding any object to the earth is the same as the force holding the moon, the planets, and other heavenly bodies in their orbits. According to Newton's law of universal gravitation any two masses in the universe attract each other with a gravitational pull. The size of this force is given by:
F is the force between two masses (in Newtons)
m and M are the two masses (in kilograms)
R is the distance between the center of these masses (in metres)
G is the universal constant of gravitation (6.7 x 10-11 Nm2/kg2)
Gravitation is actually a very weak force. The pull is too weak to be felt between two people and it is not even strong enough to pull together two lumps of lead placed right next to each other. It is only when one of the masses is the size of a planet that we can feel the force of gravity.
The huge gravitational force of our nearest star, the Sun, holds together the nine planets of our Solar System. The planets move through space at speeds that just balance the Sun’s gravitational pull, so they are locked into a permanent circle (orbit) around the Sun. Moons orbit planets, and satellites and spacecraft orbit the Earth, in the same way. Satellites are not defying gravity in circling endlessly around the Earth, it is just that they are moving so fast around the Earth that gravity never brings them any closer.
Gravity indicates gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.
Gravity is the force that holds us on the ground and causes objects to fall back to the ground after being thrown in the air.
The force holding objects to the earth's surface depends not only on the Earth's gravitational field but also on other factors, such as the Earth's rotation.
The Earth’s gravitational pull extends out into space in all directions. The further you move away from the center of the Earth the weaker the force becomes.
The measure of the force of gravity on an object is the weight of that object. Weight is measured in newtons (N). The weight of an object changes depending on its location in the universe.
- 1 decade ago
yes, there is a little difference between the two terms..
Force of Gravity means the force of attraction between any object towards the Earth,
but on the other hand - Gravitational force is the universal force of attraction or repulsion between any two objects in the universe.
Note that Force of gravity will be always attractive force but gravitational force may be attractive or repulsive.
gravitational force when between any body and earth will be known as force of gravity.
Hence force of gravity may be called as gravitational force but gravitational force will be said as force of gravity, when earth is included as a body.
- Dr. ZorroLv 71 decade ago
Gravitation is the general force between two masses. The term gravity is used for the pull of the earth.
So before Newton, people knew gravity. After Newton's discovery that this force was very general (universal) and that for instance the pull of the sun on the earth was the same force, this general force was called the law of universal gravitation.
The other answerer Karishma forgot to quote her source (shame on you Karishma! ;-) ). She copied her answer in full from http://alex.edfac.usyd.edu.au/methods/science/stud...
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- Anonymous7 years ago
Gravity happen only presence of earth and between another body where gravitation happen any two bodies
- gintableLv 71 decade ago
Put it this way:
The terms are used interchangeably and there doesn't really need to be a difference between the two...
...but however there is. It isn't really worth your efforts to know the difference, but the difference is that gravity is local, and gravitation is universal.
- Anonymous5 years ago
GREAT question. The answer is that nobody knows. Nobody has a clue what gravity is, what causes it, why it is the way it is. We can describe how it functions, but we have no idea why it works. Oh, and just saying that space is warped, and that's why there's gravity is pretty much the same as the idea that the earth rests on the back of a giant turtle, and this turtle rests -- you guessed it -- on the back of an even larger turtle, and so on, and so on...
- Anonymous7 years ago
Gravitational pulse, around a specific object.
- 6 years ago
Gravitational fore is universe force.......gravity is not universal force......