Re: The Olympics, egg drop

["Bernard G. Cleyet & Nancy Ann Seese" <georgeann@REDSHIFT.COM>]

More mmmm..

I used the wrong word!   I suppose, in homology to chemical dynamic equilibrium, e.g. concentration,  I should have used dynamic equilib.  In this case  it's due to wind, while in the other, the water
could be frozen and the two forces would cancel w/o rotation.

I agree with your "..... considered to act."

bc

P.s. W/o much thought.

"S.Goelzer" wrote:

> How about at terminal velocity? Is that static or dynamic? Or are we arguing frame of reference.
>
> On reflection, the center of pressure (or buoy. , mass, gravity, etc.)  may not be a force; it maybe better defined as a location at which a force can be considered to act.  Better?
>
> Mmmmm....
> good to think carefully about this stuff.
>
> Thx
> Scott
>
> > Date:    Tue, 3 Oct 2000 20:44:48 -0700
> > From:    "Bernard G. Cleyet & Nancy Ann Seese"
> > Subject: Re: PHYS-L Digest - 2 Oct 2000 to 3 Oct 2000 (#2000-347)
> >
> > Mmmmm....
> >
> > Both are centres of force;  one dynamic the other static; therefore, I think
> > buoyancy applies to only the static case
> >
> > No?
> >
> > bc
> >
> >
> >
> > "S.Goelzer" wrote:
> >
> > > > ------------------------------
> > > >
> > > > Date:    Mon, 2 Oct 2000 15:39:17 -0700
> > > > From:    "Bernard G. Cleyet & Nancy Ann Seese"
> > > > Subject: Re: The Olympics, egg drop
> > > >
> > > > Am I mixed up, or is not centre of force more appropriate?
> > > >
> > > > bc
> > > >
> > > >
> > > >
> > > > "S.Goelzer" wrote:
> > > >
> > > > > "centre of air resistance" is also called center of pressure (CP).  When
> > > > building
> > > > > model rockets the CP must be after the center of mass  for the rocket to fly
> > > snip
> > >
> > > Maybe it _should_ be center of air resistance force, but I went and pulled the
> > report "Technical Report TR-1 Rocket Stability" by Vernon Estes in which he defines
> > and refers to center of pressure.  Is this much worse than say the term center of
> > buoyancy?
> > > Scott
> *****************************
> S.Goelzer
> Physics Teacher
> Coe - Brown Northwood Academy
> Northwood NH 03261
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