Question

state the universal law of gravitation write the expression of the gravitational force
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Answer 1

Newton's universal law of gravitation states that when two body are separated by a distance r, then both attract each other with a force which is directly proportional to the product of their masses ($m_{1} and m_{2}$) and inversely proportional to the square of distance between them (r). This force is termed as gravitational force.

Mathematically, gravitation force is given by

$F=Gm_{1} Gm_{2} / r^{2}$

where G is gravitatinal constant.