Date: Wed, 16 Mar 2005 06:01:35 -0800 (PST)

Author: Marc Kossover

Subject: Reflectors for motion detectors

Post:

Howdy-

I know that many of you all use the Vernier (and
Pasco) Motion Detectors in class. I was having trouble
getting good reflections off of the Pasco Carts. My
first solution was placing a reflector (a piece of
cardboard) in the cart. See
.
However, the reflection would sometimes bounce off of
the the front of the cart and sometimes off of the
cart, causing weird jumps in the data.

I figured that the reflector would work better if it
were placed on the front of the cart, but how to make
it stay? I tried tape, but it left a mess when
removed. Rubber bands got out of alignment, and the
card would drag on the track.

The trick was taping a couple of paper clips to the
back of the card and then using the magnets built into
the carts for elastic collisions to hold on the card.
See


Works like a charm, and we now get super smooth data.

Marc "Zeke" Kossover
The Jewish Community High School of the Bay



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From peacock@physics.utah.edu Wed Mar 16 09:06:32 2005

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