Quote:
Originally Posted by 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 doesmeet 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. |
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All experimentation with gravitational effects discards the effects of air resistance. When the factor of air resistance is allowed to influence the observations a parachutist for example, along with a lot of birds, airplanes, flying seeds and so forth fall out of the sky like a shot. I hope you're clear on this air resistance business. What I mean to say is air resistance has nothing to do with the issues at hand and that's what you've been subjecting from the start. Yes. From the beginning I specified: "In the absence of air resistance". What else?
Yes. I am saying that a boulder and a feather 'fall' at the same rate of acceleration. I am saying this because the entire frame of reference - including the moon or any other major gravitational coordinate system - is accelerating upward to meet apparently descending objects.
Gravitational effects are the same - per coordinate system - regardless.
Dear Nobody: It seems as though you're being indirectly obtuse in the circuitous sense.
If you find me 'circuitous': it's because I'm following you.
Regards
-RP