Question

state universal law of gravitation. write it's mathematical expression.

Answer 1

​And it's Newton who we credit with the law of universal gravitation. This law states that two objects attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Answer 2

The law states that,

Any two objects in the universe attract each other with a certain force. This force of attraction is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Let the masses of the two objects be m and m' and suppose that the distance between them is r units and the force acting upon them is F.

A mathematical expression for the law may be given as,

F∝$\frac{mm'}{r^{2}}$