For the upward-curving slide, the person is still accelerating down the slide, but since they have a circular motion, there is also an acceleration pointing towards the center of the circle.

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) ...

Pickett & Eckel, a slide rule manufacturer based in Chicago and Alhambra, Calif., distributed a small booklet with this instrument, one of the few circular slide rules sold by the company and possibly ...