Tuesday, July 27, 2010

Gravitational force

The terms gravity and gravitation are often used to explain the same thing, but there is a definite difference between the two.

Gravitational force is the attractive force existing between any two objects that have mass. The force of gravitation pulls objects together.

Gravity is the gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.

Force is the cause that produces motion, change in motion and deformation in objects. In our daily life, we observe that force is needed to throw a ball, to stop a ball, and to stretch or compress a spring.

In macroscopic world, we experience a number of forces like gravitational force, muscular force, contact force between bodies, frictional force, etc., also in microscopic use number of forces like electric and magnetic forces, strong nuclear force and weak nuclear force.

The gravitational force is attractive in nature and arises die to attraction between any two objects due to their masses. It is universal force and acts between any two objects of universe. All objects on earth experience gravitational force due to large mass of earth.

According to Newton’s law of gravitation, “The gravitational force of attraction among two objects is directly proportional to the product of their masses and inversely proportional to the square of distance among them”.

In our next blog we shall learn about electron affinity

I hope the above explanation was useful.Keep reading and leave your comments.

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