Of course objects have mass because Mass is any object that has weight.
Gravity is greater between objects with large masses than between objects with small masses.
Objects of greater mass have more gravitational pull.
It will be larger between the large objects. This force is equal to the universal gravitational constant times the two masses of the objects, all divided by the square of the distance apart the objects are.
The force of attraction between objects that is due to their masses is Gravity!
When volume is constant, the masses of two objects are in direct proportion to their densities.
The masses of the two objects and the distance between them.
-- the product of the masses of the two objects -- the distance between the two objects' centers of mass
Yes. All objects that have mass are affected by gravity and the gravitational force varies with the masses of the objects.
Their masses are different. (Mass = density * volume)
Increase the masses.
is an objects density the measure of the amount of matter in the object compared to known masses
Those were the objects the mechanics were developed for.