# Newton´s Law of Universal Gravitation

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by jashar05
Last updated 8 years ago

Discipline:
Science
Subject:
Physics   Newton's Law of Universal Gravitational

The acceleration of gravity on or near the Earth,for example is inversely proportional to the square of the distance from the center of the Earth. So it diminishes as you rise from the surface. When you have ascended to an altitude of one Earth radius about 4,000 miles your distance from the center is then two Earth radius so the acceleration of gravity has shrunk to 1/4 of its value on the surface.

Newton's Law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Newton's law of gravitation resembles Coulomb's law of electrical forces, which is used to calculate the magnitude of electrical force between two charged bodies. Both are inverse-square laws, in which force is inversely proportional to the square of the distance between the bodies. Coulomb's Law has the product of two charges in place of the product of the masses, and the electrostatic constant in place of the gravitational constant.

we can use Newton's law of universal gravitation to find the local gravitational acceleration,

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