How does the centre of mass of bodies affect the force of gravitation between them?

If the masses of two bodies are quadrupled and the distance between their centres is doubled, then how many times the force of gravitation between them will be changed ?

Two balls, each of radius R, equal mass and density are placed in contact, then the force of gravitation between them is proportional to

On applying force to the centre of mass of a body one of the following is present in the body?

The masses of two spheres are 10 kg and 20 kg respectively. If the distance between their centres is 100m, find the magnitude of the gravitational force between them.

A particle of mass m is located inside a spherical shell of mass M and radius R. The gravitational force of attraction between them is

The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become:

If distance between two masses is quadrupled, what will be the new force of attraction between them? given the initial gravitational pull is 9.8N.

Assertion: When distance between bodies is doubled and also mass of each body is also doubled, gravitational force between them remains the same. Reason: According to Neweton's law gravitational, force is directely proportional to mass of bodies and inversely proportional to square of distance between them.