Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?

How does the gravitational force between two objects depend upon the.distance between them?

A bigger rain drop falls faster than smaller one. Why ?

How does the gravitational force between two objects depend upon their masses?

The gravitational force between two objects of small masses on the surface of the earth can be neglected. Why?

Why does sound travels faster in iron than in air?

Two heavy spheres each of mass 100 kg and radius 0.10 m are placed 1.0 m apart on a horizontal table. What is the gravitational force and potential at the mid point of the line joining the centers of the spheres? Is an object placed at that point in equilibrium? If so, is the equilibrium stable or unstable?

What happens to the force between two objects, if the masses of both objects are doubled?