what is gravtation
Answers
Answer:
You have asked a very confused question. Gravity is a force. It is one of the four fundamental forces (gravity, electromagnetic, weak and strong) in the universe. The entire point of unified field theory is to try to see how these four fundamental forces are all aspects of one force (like electrical and magnetic forces are deeply related). Gravity has been viewed many ways: Aristotle postulated that all things naturally were attracted to the center of the earth. Galileo decided that Aristotle was wrong, and that all objects, regardless of weight, would fall at the same rate in a vacuum. Newton's law of gravity specified the quantitative form of gravity. Newton's equation for gravitational force is that gravity is proportional to the product of the masses of the two bodies, and inversely proportational to the square of the distance between their centers of mass. Einstein revised Newton's law, showing that gravitational force moved at the speed of light, and that bodies experiencing gravitational forces moved along the shortest path in a curved 4-dimensional space. The curvature is due to the presence of mass in the space. Now it is felt that gravitons are messenger particles that travel between bodies with mass to transmit the gravitational force. Gravitons have not been observed however. There is also some evidence for antigravitational forces at work in the cosmos. All that background aside, you want to ask what causes gravity? Well to be honest, no one knows. Maybe as we continue to investigate, we will find out that it is required to create a stable universe, or something. We just do not know enough.
Explanation:
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Answer:
Explanation: Gravitation is one of the most studied phenomena in physics. Isaac Newton defined its behavior with his famous Law of Universal Gravitation. Newton hypothesized that the force of gravity between any two spherical objects of uniform density is directly proportional to the product of their masses, and inversely proportional to the square of the distance between their centers. According to this law, if m1 and m2 are the masses of two objects, and if their centers are separated by a distance d, then the gravitational force (f) between them is given is given by the following formula:
f = km1m2/d2