Dear all,
Kevin wrote:
>>>
Actually, one of my professors at CCPM in the Biomechanics
Department, Jack Morris, DPM, would often talk to me about "flow of
force" when I was a Biomechanics Fellow. I never felt comfortable
with the concept of "flow of force", but I have never heard a really
good discussion as to why this concept of "flow of force" is not a
preferred or valid method of describing the mechanical interactions
of objects with each other within the biomechanics and engineering
textbooks. Anyone have any ideas, Bart or Norman or Eric, are you
listening in?
>>>
Of course there is no flow of forces in mechanics, but I can
understand why force appears to flow for some people..
During stance phase of gait, the point of application of the GRF on
the foot is continuously moving from aft to front in this way
creating the illusion that not only the point of application but also
the force is flowing through the segment. But this is not a corrcet
way of viewing this phenomenon.
F orces are *applied* and only the energy or power they create, can
"flow" (being transmitted) from one segment to another
I hope this explanation may take away rather than create confusion
Regards to all,
Bart
--
*******************************************************************
Bart Van Gheluwe
Laboratory of Biomechanics
Vrije Universiteit Brussel -Fac. LK
Vakgroep BIOM
Pleinlaan 2, 1050 Brussel, Belgium
Tel.: 02/629.27.33 (31)
Fax: 02/629.27.36
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