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No access to Physics Teacher, but the URL to the spinner demo
was interesting
https://www.youtube.com/watch?v=G7hh42AgBlQ&feature=youtu.be
Grabbing the screen plot here
<http://s880.photobucket.com/user/betwys/media/ScreenHunter_355%20Sep.%2017%2021.31.jpg.html?sort=3&o=0>
Allows x,y estimates to be extracted via Graph Grabber (a free
download) leading to a fit to this function:
rate = 13.7123447*exp( -0.0891256151* time^(2/3) )
The plot of this fit given here:
<http://s880.photobucket.com/user/betwys/media/rotation.jpg.html?sort=3&o=0>
Notice the amusing precision of the model from such rough and
ready data!
Brian W