LAW OF GRAVITION

Definition : Every body in the universe attracts every body with a force which is directly proportional to the product of their masses and is inversely proportional to the square of the distance between their centers.

Explanation :to consider this let us consider to masses (m1  and m2 ) are placed at the distance of (d) as sow below

Solving :

                F ∝ m1 * m2 

                F ∝ 1/d^2

          combinig equations 

                F = G m1m2 / d^2

 where G is the proportionaly constant its value is 6.673*10^-11 Nm^2/kg^2