Gravity, also called gravitation, is a force that exists among all material objects in the universe. For any two objects or particles having nonzero mass , the force of gravity tends to attract them toward each other. The Universal law of gravitation states that:
Every mass exerts an attractive force on every other mass.
If there are two masses m1 and m2 and the distance between them is d as shown in figure.
The gravity formula is given by
G is a constant equal to 6.67 $\times$ 10-11
= mass of the body 1,
= mass of body 2,
r = radius or distance between the two bodies.
The gravitational force formula
is very helpful in finding larger radius, larger mass, gravity values etc.