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From: James Mclean <jmclean@chem.ucsd.edu>
It seems odd to me that you suggest using "weight" in a way that agrees
with every-day experience on Earth, but that once you are up on the space
shuttle you want to ignore simple experience.
I think the answer lies in the last sentence of your first paragraph. On
earth, the apparent centrifugal force is negligible; nonetheless, it
technically should clearly be included in what we experience everyday as
"weight". If is is also included on the space shuttle, then we find the
astronauts to be "weightless."