Gravity

Gravitation is defined as the force of attraction between any two bodies in the universe. The earth attracts (or pulls) all objects lying on or near its surface towards its centre. The Force with which the earth pulls the objects towards its centre is called the gravitational force of the earth or gravity of the earth.

Universal Law of Gravitation
Universal law of gravitation was given by *Isaac Newton. According to this law, the atractive force between any two objects in the universe is directly proportional to the product of their masses(Mass) and inversely proportional to the square of distance between them. e direction of the force is along the line joining the centres of two objects.

Important points
1. Force is directly proportional to product of masses of bodies.

2. It is indirectly proportional to distance between bodies.

3. Formula for F = G*m1*m2/d² Where G is the constant of gravity and m1 and M2 are the masses of bodies and d² is the square of distance between them.