Re: no lab facilities

["Richard W. Tarara" <rtarara@SAINTMARYS.EDU>]

Simulations can be used as a data analysis tool.  For example, I do an
experiment with a 6 cm diameter foam ball where student measure the falling
time from a variety of heights (a few centimeters to over 10 meters).  One
could then use a simulation to try and match the observed behavior.  We
actually use spreadsheets and program in the physics where the adjustable
parameters are the power law dependence on 'v' of the air resistance, and
the shape form factor in the air resistance formula.  It works quite well,
but I could also see the same thing being done with something like
Interactive Physics.

Rick

BTW:  The foam balls are $3 a dozen from Oriental Trading, you can get
decent stop watches for under $10, and a tape measure or two is then all you
need to do this experiment!


----- Original Message -----

From: "Ludwik Kowalski" <KowalskiL@MAIL.MONTCLAIR.EDU>
> Robert A Cohen wrote:
>
> > ... If the purpose of the lab is to verify theory,
> > then using a simulation is circular in my opinion.
>
> True. Simulations belong to problems solving methods, not to
> laboratory activities. Like with any other problem, a person can
> ask somebody else to solve it or s/he can do it personally. To
> solve problems with computers students must know how to
> program. Using a program written by somebody else is not
> a substitute.
>
> Interactive Physics is an narrow-minded expert. A great
> expert to ask questions and to learn from answers. It often
> helps those who already know physics. It was not created
> to replace laboratories.
> Ludwik Kowalski