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Subject: Re: Torque, moment, and couple
Date: Sat, 8 Apr 2000 22:06:01 -0700
From: Leigh Palmer <palmer@SFU.CA>
[snip]
How would
one use the quantity r x (m * v) in any frame other then the one in
which v = dp/dt?
One more thing should be mentioned regarding the physical nature of
torque. Torque is not, strictly speaking, a vector quantity. Vector
quantities are associated with an intrinsic direction. No one has to
explain which direction is meant when specifying a force or velocity,
both of which are vector quantities. Torque, like angular momentum
and magnetic field, is axial, but not directional. In Gibbsian terms
it is a "pseudovector".