Diff'rent Strokes is the name of an American sitcom that aired from 1978 to 1986 about two black children who were adopted by a rich white widower who had a daughter and a maid. The cast members included Todd Bridges[?], Gary Coleman, Dana Plato, and Conrad Bain[?].
... applied force will cause one end of the axis to push against the upper rim of the groove, while the other end of the axis pushes against the lower rim of the groove. ...