Gravitational Force

Gravitation
The force of attraction between any two objects of the universe due to their masses is called gravitation. The force of gravitation is always the force of attraction. It is never repulsive. It is a type of weak force. The effect of gravitational force is seen on every objects of the universe. The effect of gravitational force is more in liquid than solid because the molecules of the liquid are loosely composed with less intermolecular force of attraction.
NEWTON'S UNIVERSAL LAW OF GRAVITATION
It state that "The gravitational force is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.
The equation (iii) is the mathematical expression of Newton's law of gravitation. Form this equation, we can calculate the masses of the heavenly bodies and distances between them. The value of G is 6.67 x 10*-11 Nm*2/kg*2.
Note: * represent the power(ie.ten to the power minus eleven).

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