Marcus wrote in USMA 21151:

>I feel quite strongly that rpm is also another... "idiocy" we could do
>without (sorry, couldn't find a better adjective for it).  If we are to
>think of this property as "periodical" we could certainly think of
>replacing it with Hz (or a prefixed "version" of it, like cHz or mHz).  If
>we think of "rotational speed" (in angular form) then we'd be talking
>about this in rad/s, I'd think.


It is easy to chang rpm into rev/s.  x rpm = x/60 rev/s.  To change rev/s
into rad/s is more difficult.  y rev/s = 2�y rad/s.

Joseph B.Reid
17 Glebe Road West
Toronto  M5P 1C8             Tel. 416 486-6071

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