Here is a plot of a human's trajectory on a circular curved slide, and you can see how fast they go with a high (0.6) or low (0.1) coefficient of friction. (Remember, that's the Greek letter “mu ...

Object Details maker Kegelman Bros. Description This white plastic circular rule has a clear plastic indicator attached with a metal grommet in the center. The rule has scales of H (horizontal factor) ...

Object Details maker Pickett & Eckel, Incorporated Description This yellow aluminum circular slide rule has three clear plastic indicators, one blank. The other indicator on the front is marked in red ...