On Thursday, May 4, 2023 at 2:46:11 PM UTC-7, RichD wrote:
An analysis of the canonical ice skater:
https://phys.libretexts.org/Bookshelves/Classical_Mechanics/Variational_Principles_in_Classical_Mechanics_(Cline)/12%3A_Non-inertial_Reference_Frames/12.08%3A_Coriolis_Force
I don't dispute his analysis, though his notation and
presentation is awful.
However, I don't accept his conclusion: the chemical
muscle energy which withdraws the arms, eventually
stores as kinetic energy in the flywheel (the skater).
--
Rich
It reduces the angular moment?
It sort of seems like that force for "f = ma" is to be a derived quantity instead of a defined quantity, about things like "m/s or s/m, which
one should be, velocity or inverse velocity" about the changes in
units over time, over time.
It's like in a system of potentials, that, the potential increases,
then, it sort of "runs out" instead of "builds up".
I.e., in a theory where "it's sum potentials what are real and
the classical is inverted", it's a thing.
I put it in these terms because you can't really hear "centrifugal"
when "the pail-experiment has a centripetal force", that there
only is a "true centrifugal" in the "sum of potentials".
There's a usual ambiguity of centrifugal and centripetal.
Then also "Coriolis" is another, "force", here that otherwise
expresses exchanging potential energy the lever moment of
the arm for the potential energy the angular bit.
It's kind of like framing it in a "sum-of-histories" for path integral,
that "sum-of-potentials" is real.
In Einstein's Out of My Later Years he looks at a sort of
attack on classical motion for his total field theory, ...,
I sort of frame that in terms of: "Newton's Zero'eth laws".
This is about where "bringing to motion" and "coming to rest"
are two different things: yes I know that's separate or extra
the usual notion they are same.
--- SoupGate-Win32 v1.05
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