That's an excellent, easily envisioned example, Gene. What is appealing
to me is that it can also be used to describe forward (say, positive)
[rectilinear] velocity concurrent with forward (positive) or rearward
(negative) acceleration.
Jim
Gene Mechtly wrote:
....
> A rotating automobile wheel is a much simpler example.
> Car moving forward, the angular velocity vector of each wheel is to the
> left whether the car is accelerating (ang acc to left) or slowing (ang acc
> to the right).
....
--
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