Universal law of gravitation
This is published on 5 july 1687 According to Newton’s Universal Law of Gravitation, the force exerted between two objects, by each other is given by the following relation. Law of universal gravitation states that any two bodies in the universal attract each other with a force that is direct proportional to the product of their masses and inversely proportional to the square of the distance between them .this is a general physics law from empirical observations by what Isaac Newton called introduction.
The actual force exerted between two bodies can be given by the following equation
Where G is the universal gravitational constant with a value
G here is an empirical constant of proportionality
Difference between G and g in gravitation
G is universal gravitation constant whose approximately value is 6.673×10−11N. And "g" is accelaration due to gravity whose value is 9.8 meter per second2 .