Balancing the tires on one's car is an example of dynamic equilibrium
which is non-trivially different from static equilibrium of the tire
when the car is parked.
________________________
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 Savinainen Antti
| Sent: Monday, September 25, 2006 9:32 AM
| To: phys-l@carnot.physics.buffalo.edu
| Subject: [Phys-l] Dynamic equilibrium in mechanics
|
| Hi,
|
| I have occasionally seen the term "dynamic equilibrium"
| describing situations in which the object is moving at
| constant velocity and the net force on the object remains
| zero. Furthermore, when object is at rest the equilibrium is
| called "static". I'm not sure, however, that there is much
| physical insight in this distinction since both cases include
| zero acceleration. Zero velocity and constant velocity have
| equal footing: both cases (zero net force, zero acceleration)
| imply an inertial frame of reference.
|
| Any opinions whether the distinction (static vs. dynamic
| equilibrium) is useful in teaching mechanics? (The idea of
| dynamic equilibrium is, of course, useful in thermal physics
| and chemistry.)
|
| Regards,
|
| Antti
|
| Antti Savinainen, Ph.D., B.Ed.
| Senior Lecturer in Physics and Mathematics Kuopio Lyseo High
| School Finland
| E-mail: <antti.savinainen@kuopio.fi>
| Website: <http://kotisivu.mtv3.fi/physics/>
|
|
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