[N0B0DY]

RP,

It seems as though you're being indirectly obtuse, in the circuitous sense.

If we follow the implications of your first explanation, then we are forced to conclude that objects of different masses would strike the ground at different times. We both seem to agree that they strike the ground at the same time.

If we follow the implications of your last explanation where the difference in mass of the grain of sand and the boulder is negligible, then we are forced to conclude that a feather and a boulder would strike the ground at the same time. We both seem to agree that they strike the ground at different times due to air resistance having a greater counter effect on the acceleration of the feather than the boulder.

The problem that I see with your proposed spatial exapnsion is that the air resistance would not have any counter effect if all particles are said to be expanding proportionately. The feather and the boulder would expand to meet the earth at the same time. Or are you saying that the feather does meet the earth at the same time as the boulder?

Also, how does spatial expansion come into play for objects on the moon? If gravity is in accord with the accelerating universal expansion as a constant, I would think that the gravitational effect would be the same regardless.