Re: asymmetry measure

[Bernard Cleyet <anngeorg@PACBELL.NET>]

Science Fair:



Alissa Schunter         The Effects Of Gravity And Air Resistance On The
Trajectory Of A Bullet  Junior Mathematics & Computer Sciences  Boltz
Junior High School


I'll continue searching 'till someone else comes up w/ the equations --
I'm certain it's easy de nuovo. Just add a -coefficient(v^2) in the
direction of motion to the  parametric equations.

In searching I found the claim that grosse Bertha was inaccurate until
the trajectory was assumed an ellipse instead of a parabola.

bc



Ludwik Kowalski wrote:

> The Interactive Physics, as I recall, gives one a
> crude way of controlling air resistance. Thus one
> can collect data by simulating experiments. Then
> one can try to describe the data with a formula,
> or test a preexisting formula. For real data one
> should consult artillery manuals, I suppose.
> Ludwik Kowalski
>
>
> On Thursday, February 5, 2004, at 09:10 AM, Ludwik Kowalski wrote:
>
>
>
> > What Alex wants, probably, is a formula which
> > gives the value of the air resistance coefficient
> > as a function of an asymmetry parameter, such
> > "the optimal launch angle," or "the difference
> > between the ideal and real ranges." I have
> > not seen such formulas.
> > Ludwik Kowalski
> >
> >
> > On Thursday, February 5, 2004, at 08:12 AM, Brian Whatcott wrote:
> >
> >
> >
> > > As a straw man, I will offer as a measure, the optimal launch angle
> > > for maximum range.
> > >
> > > Brian W
> > >
> > > At 05:03 PM 2/4/2004, you wrote:
> > >
> > >
> > > > In projectile motion without resistance the path is a parabola.
> > > > With resisatance, the path is asymetric. Is there a standard way to
> > > > measure that asymetry? Can that measure be analytically related to
> > > > the
> > > > the resistance?
> > > > ce
> > > Brian Whatcott    Altus OK    Eureka!