Gravity | Definition, Physics, & Facts | Britannica
2024年9月25日 · gravity, in mechanics, the universal force of attraction acting between all bodies of matter. It is by far the weakest known force in nature and thus plays no role in determining the internal properties of everyday matter.
Newton’s law of gravity - Encyclopedia Britannica
2024年9月25日 · By his dynamical and gravitational theories, he explained Kepler’s laws and established the modern quantitative science of gravitation. Newton assumed the existence of an attractive force between all massive bodies, one that does not …
Newton’s law of gravitation | Definition, Formula, & Facts | Britannica
Newton’s law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them. Isaac Newton put forward the law in 1687.
Gravity - Force, Physics, Theory | Britannica
2024年9月25日 · Gravity - Force, Physics, Theory: The Newtonian theory of gravity is based on an assumed force acting between all pairs of bodies—i.e., an action at a distance. When a mass moves, the force acting on other masses had been considered to adjust instantaneously to the new location of the displaced mass. That, however, is inconsistent with ...
Development of gravitational theory | Britannica
gravity, Universal force of attraction that acts between all bodies that have mass. Though it is the weakest of the four known forces, it shapes the structure and evolution of stars, galaxies, and the entire universe.
Gravity - Acceleration, Earth, Moon | Britannica
2024年9月25日 · The gravitational potential at the surface of Earth is due mainly to the mass and rotation of Earth, but there are also small contributions from the distant Sun and Moon. As Earth rotates, those small contributions at any one place vary with time, and so the local value of g …
Gravity: From Apples to the Universe | Britannica - Encyclopedia …
Why do objects fall to the ground? “Because of gravity,” you say. But what is gravity? The ancient Greek philosopher Aristotle said that objects fall because each of the four elements (earth, air, fire, and water) had their natural place, and these elements had a tendency to move back toward their natural place.
Gravity - Experimental Study, Newton, Einstein | Britannica
2024年9月25日 · Gravity - Experimental Study, Newton, Einstein: The essence of Newton’s theory of gravitation is that the force between two bodies is proportional to the product of their masses and the inverse square of their separation and that the force depends on nothing else.
gravity - Kids | Britannica Kids | Homework Help
Gravity is a pulling force that works across space. That is, objects do not have to touch each other for the force of gravity to affect them. For example, the Sun, which is millions of miles from Earth, pulls on Earth and the other planets and objects in the solar system.
Gravity - Fields, Relativity, Theory | Britannica
2024年9月25日 · Learn about the significance of gravitational waves in science and in everyday life. (more) See all videos for this article. According to general relativity, the curvature of space-time is determined by the distribution of masses, while …
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