But i was trying to determine how density or other properties of matter would affect gravity effect. I know it doesn't, but why not?
What properties does matter have? Mass, velocity, spin (which I am assuming/suggesting "causes" charge).
Have you ever wondered why it is that G is such a small number?
Density does affect the gravitational effect: If Earth were twice as dense, but with the same mass, it would have a radius of 5057km and g at the surface would be 15.6 ms-2. If Earth were twice as dense, but the same volume, then g at the surface would be 19.6 ms-2.
Gravity acts on mass, so density affects the gravitational effect - this profoundly obvious fact seems to have been overlooked at the sub-atomic level, where G is still used with the same value as at the level of atomic structures.
The Earth has a mass of 5.97x1024 kg and a volume of 1.09x1021 m3, but of that volume, 99.999999999982% is empty space, gravity acts on only the other 0.000000000018%, because that is the proportion of volume occupied by the mass. An interesting comparison G= 0.0000000000667 - Have you ever wondered why it is that G is such a small number?
Gravity acts on mass, gravity can ONLY act on mass.
Objects with mass are affected by force. Objects with mass can ONLY be affected by force.
Michael
It is used in math and i don't do math, though i am learning some equations and their relationships from you.