Step-by-step explanation:
There exist a force of gravity between two masses. It is given by :
...........(1)
Where
G is the universal gravitational constant
m₁ and m₂ are masses
r is the distance between them
From equation (1) it is clear that the force of gravity between two masses is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
So, the gravitational force between two objects is directly proportional to the product of the masses of the objects