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Colleagues:
In years gone by, Central Scientific Company sold a "car-and-track"
apparatus that was designed to verify Newton's second law. I don't
know the original equipment number, but it is described and pictured
in CENCO's Second Law of Motion lab (71990-121, formerly M21b).
We have ONE of these units, which I haul back and forth annually
between our two campuses, so I would very much like to acquire a
second one.
I realize that an "improved" version of this apparatus is available,
but the big improvement was to try to reduce friction. However, I
use this apparatus for a lab whose main goal is to measure the force
of friction and calculate the coefficient of friction, so the older
apparatus is really more appropriate. (OK, don't shoot! I realize
it is actually rolling resistance...)
If anyone happens to have an unused. original car-and-track apparatus
taking up space in the storeroom, and would be willing to part with
it, please contact me off-list to discuss terms. (If you aren't sure
whether or not what you have is what I want, contact me and I will
send the diagram from the lab cited above.)
Thank you!
Charles Crook
Charles R. Crook
Instructor of Chemistry and Physics
Rappahannock Community College
12745 Campus Drive 52 Campus Drive
Glenns, VA 22573 Warsaw, VA 22572
804-758-6883 804-333-6883
FAX: 804-758-3852
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