Posted by MarkB_MI on February 04, 2009 at 02:42:41 from (216.234.98.95):
In Reply to: Re: pm motor posted by teddy52food on February 03, 2009 at 18:22:04:
Teddy, the definition work is force applied through a distance. And the definition of power is work performed at a rate. If you say that a magnet holding something in a stationary position constitutes "power", all you've done is to redefine the word "power" and by extension redefined "work". And since "work" is just another word for "energy", you've also redefined "energy".
The problem with redefining a word is that it doesn't change the underlying principles. So you can say that work, power and energy are something different, but that doesn't make them useful. You can't use your redefined energy to heat your home, move your car or operate your cell phone.
Surely anyone who throws "E=mc2" around knows all this.
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Today's Featured Article - Bad Vibes - by Curtis Von Fange. One of the strangest ways to communicate with our tractor is to ask it how it feels. "Ask it how it feels," you say? Yup, ask it how it feels. Now, as with the other articles in this series one has to be able to hear what 'ole blue' is trying to say in response. The nice thing about our old iron friends is that they are usually quite consistent in their response, rather unlike some people I know who might change what they say due to the weather or other mitigating circumstances. But since t
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