Good job on the subject line, Bill; I often forget to do that.
I don't think that radians are going to go away in either of our
lifetimes. It's one of the derived units that physicists and many
engineers are fond of.
Most certainly I do not agree with "degree velocity" or "radian
velocity". That confounds unit and quantity names, rather like saying
"meter height" or "hertz frequency".
Jim
Bill Hooper wrote:
On Mar 22 , at 2:47 PM, James R. Frysinger wrote:
So if I say, "The motor is running at
8600/s" what do I mean? Better to say, "The motor is running at a shaft
rotation rate of 8600/s" or "The motor is running at an angular velocity
of 8600 rad/s", whichever is the case. Of course those differ by a
factor of 2 pi.
I agree with this (above) and would further argue that, if we indeed do
insist on naming the measured rate by proper names like "rotation rate",
"angular velocity" etc. then it should be possible to see that rotations
are not units and the, correspondingly, neither are radians.
(Since degrees per second are also used for angular velocity, one would
need different names for these two things. I'd suggest "degree velocity"
and "radian velocity".)
Abandoning the practice (built firmly into SI) of treating the radian as
a unit would, in my opinion, be progress.
Regards,
Bill Hooper
Fernandina Beach, Florida, USA
PS And I remembered to change the subject on this as I go off on a tangent.
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James R. Frysinger
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