Gravity | Definition, Physics, & Facts | Britannica
2024年12月21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.
Gravity - Force, Physics, Theory | Britannica
2024年12月21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.
Newton’s law of gravitation | Definition, Formula, & Facts | Britannica
2024年12月17日 · planetary orbits: Kepler, Newton, and gravity Brian Greene demonstrates how Newton's law of gravitation determines the trajectories of the planets and explains the patterns in their motion found by Kepler.
Physics - Gravitation, Mechanics, Energy | Britannica
2024年12月9日 · Newton’s gravitational law states that every material particle in the universe attracts every other one with a force that acts along the line joining them and whose strength is directly proportional to the product of their masses and inversely proportional to …
Gravitational constant | Definition, Value, Units, & Facts | Britannica
2024年11月23日 · Gravitational constant, physical constant denoted by G and used in calculating the gravitational attraction between two objects, which is equal to G times the product of the masses of the two objects divided by the square of the distance between them. The value of G is 6.6743 x 10^-11 m^3 kg^-1 s^-2.
Gravitational mass | physics | Britannica
Gravitational mass is determined by the strength of the gravitational force experienced by the body when in the gravitational field g. The Eötvös experiments therefore show that the ratio of gravitational and inertial mass is the same for different substances.
Gravitational field | physics | Britannica
In gravity: Potential theory …used for finding the resulting gravitational field. The main progress in classical gravitational theory after Newton was the development of potential theory, which provides the mathematical representation of gravitational fields.
Newton’s law of gravity - Encyclopedia Britannica
2024年12月21日 · Gravity - Newton's Law, Universal Force, Mass Attraction: Newton discovered the relationship between the motion of the Moon and the motion of a body falling freely on Earth. By his dynamical and gravitational theories, he explained Kepler’s laws and established the modern quantitative science of gravitation.
Development of gravitational theory | Britannica
Isaac Newton was the first to develop a quantitative theory of gravity, holding that the force of attraction between two bodies is proportional to the product of their masses and inversely proportional to the square of the distance between them.
Gravitation | physical process | Britannica
…takes the same form in gravitational theory, the flux of gravitational field lines through a closed surface being determined by the total mass within. This enables a proof to be given immediately of a problem that caused Newton considerable trouble.