[USMA:35575] Re: What's a good name for ten togs?

[Bill Hooper]

On 2006 Jan 5 , at 1:04 PM, Pierre Abbat wrote: Someone please explain what a cubic second is! Why don't you ask what a square second is? That's even more common that a cubic second. A cubic second is what you get when you multiply three times (in seconds) together. It is seldom (never?) encountered by itself and therefore probably does not have any physically discernible meaning by itself.  The simplest example of its use that I know of is in the measurement of rate of change of acceleration* (the derivative of acceleration, in calculus terminology).  Acceleration is measured in metres per square second (which most people to call "metres per second squared") with the symbol m/s^2**. The rate of change of acceleration* is the change in acceleration divided by the time. So the unit that results is (metres per square second) divided by (seconds) which yields metres per cubic second (or, if you prefer, "metres per second cubed") and has the SI symbol m/s^3**. Regards, Bill Hooper Fernandina Beach, Florida, USA *Rate of change of acceleration has been named "jerk", but I'm nor sure how official that name is. So "jerk" is measured in m/s^3. ** The proper SI symbols use a superscripted 2 or 3. I have used the caret mark, ^2 and ^3, since I am unable to reliably produce a superscript that is interpreted properly by other people's computers. ========================  SIMPLIFICATION begins with SI ========================