________________________
Joel Rauber
Department of Physics - SDSU
Joel.Rauber@sdstate.edu
605-688-4293
| -----Original Message-----
| From: phys-l-bounces@carnot.physics.buffalo.edu
| [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf
| Of JMGreen
| Sent: Friday, May 12, 2006 11:43 AM
| To: Forum for Physics Educators
| Subject: Re: [Phys-l] force +- momentum flow
|
| At 09:25 AM 5/12/2006, you wrote:
| >Jim,
| >Do you believe that only corporeal objects can flow?
| >______________________
| >Joel Rauber
| >Department of Physics - SDSU
|
| Oh my, I am on the brink of unleashing another unending
| discussion on the meaning of a word.
|
| If I say that the object is blue, would you understand if I
| were to say that the blue (a property of the object) does not
| flow. Blue paint can flow but blue does not. It is a
| property of the object.
|
| Momentum and energy are properties of a system. Their levels
| can be changed, but they can not move independently of the system,
|
| I would hold that using such language as a shortcut to the
| understanding of physics is counter productive. It often
| leads to a convoluted discussion of the system.
|
| Using such language in the _teaching_ of physics would be abominable.
|
| Jim
|
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