Law of gravity

Universal gravitation . Law of Physics that studies the attraction of bodies.

A highlight in the history of Physics was Isaac Newton’s discovery of the Law of Universal Gravitation: all objects attract each other with a force directly proportional to the product of their masses and inversely proportional to the square of the distance that separates their centers. This law marked a milestone in the history of humanity’s discoveries.


[ hide ]

  • 1 History
  • 2 Definition of Gravity
  • 3 Universal Gravitation Law
  • 4 Gravitational field
  • 5 Sources


In the early seventeenth century , most scientists were absolutely certain of the fairness of the heliocentric system of the universe . According to this system, which was proposed by Nicholas Copernicus , the earth and the other planets are in motion around the sun , which is the center of the planetary system.

Isaac Newton, based on the discoveries of Galileo Galilei , Johannes Kepler , Tycho Brahe and other scientists who preceded him, deduces the Law of Universal Gravitation, greatly contributing to Physics , since with this law he explains the permanent movement of the planets around the Sun All this was published in his work “Mathematical Foundations of Natural Philosophy “, published in 1687 .

By means of this Law, Newton discovered one more property of matter, in fact, matter besides occupying a place in space, being inert, porous, malleable, ductile, etc., has one more property that is mutual attraction. According to Newton’s reasoning, there is a mutual attraction between the Sun and the planets, an attraction that is greater the greater the mass of the planet, and is less the greater the square of its distance from the Sun. It synthesizes this statement in the Law of Universal gravitation.

Definition of Gravity

Gravitational interaction (or force of gravity) is the attraction between masses (bodies). Gravity is a basic force in the universe . It is the one that keeps the bodies subject to the planet Earth , the one that keeps the Earth’s own matter together and does not allow the Earth to break apart or the atmosphere to escape, the one that keeps the matter that forms the Sun and the others together. stars , the one that causes the Solar System not to disintegrate, the one that allows galaxies to exist and galaxies to unite into galaxy clusters. Gravity is what gives unity and cohesion to the cosmos, it is certainly one of the fundamental forces in the universe.

Universal gravitation law

Universal Gravitation Law.

The force of attraction between two bodies is directly proportional to the product of their masses, and inversely proportional to the square of the distance that separates them. F = G. m1. m2 / d²

Gravitational field

It is the space within which one body is capable of attracting another. The Earth has its Earth ‘s gravitational field is the space in which gravity is manifested.

The Moon , like all other bodies, has its own gravitational field, a proof of the existence of this field is the attraction that the Moon exerts on the seas, causing the tides.

The value of the gravitational field is numerically equal to the acceleration of gravity and can be represented as a vector directed towards the object that produces the field.


Leave a Comment