Gravity | Definition, Physics, Facts | Britannica Gravity, in mechanics, is the universal force of attraction acting between all bodies of matter It is by far the weakest force known in nature and thus plays no role in determining the internal properties of everyday matter Yet, it also controls the trajectories of bodies in the universe and the structure of the whole cosmos
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 - 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 is a pulling force that works across space
Gravity - Newtons Law, Universal Force, Mass Attraction | Britannica 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 Newton assumed the existence of an attractive force between all massive bodies, one
Development of gravitational theory | Britannica The laws of gravity describe the trajectories of bodies in the solar system and the motion of objects on Earth, where all bodies experience a downward gravitational force exerted by Earth’s mass, the force experienced as weight
Gravity - Force, Physics, Theory | Britannica 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 special relativity, which is based on the axiom that all
Specific gravity | Formula, Units, Equation | Britannica Specific gravity, ratio of the density of a substance to that of a standard substance Solids and liquids are often compared with water at 4 C, which has a density of 1 0 kg per liter Gases are often compared with dry air, having a density of 1 29 grams per liter (1 29 ounces per cubic foot) under standard conditions
gravity - Students | Britannica Kids | Homework Help Gravity, or gravitation, is the attraction of all matter for all other matter It is both the most familiar of the natural forces and the least understood It is the force…
Center of gravity | Definition Facts | Britannica Center of gravity, in physics, an imaginary point in a body of matter where, for convenience in certain calculations, the total weight of the body may be thought to be concentrated In a uniform gravitational field, the center of gravity is identical to the center of mass
Gravitational constant | Definition, Value, Units, Facts | Britannica 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 their centers The value of G is 6 6743 x 10^-11 m^3 kg^-1 s^-2