Question

state universal law of gravitation and write it mathematically also

Answer 1

it important are
1) the force that binds us to the earth
2) the motion of moon around the earth
III) the motion of earth around the sun
4)the Tides you to moon and the sun

Answer 2

Everybody in this universe attracts each other body with force which is directly proportional to the product of their masses and inversely proportional to square of distance between them.
Mathematically:-)F is directly proportional to Mm..........1
F is inversely proportional to 1\d2.......2
putting both eq. together
F is directly proportional to Mm\d2
F=GMm\d2