Cycloid Cycloid A cycloid is the curve traced by a point on the rim of a circular wheel as the wheel rolls along a straight line without slipping. A cycloid is a specific form of trochoid and is an example of a roulette, a curve generated by a curve rolling on another curve. The cycloid, with the cusps pointing upward, is the curve of fastest descent under constant gravity, and is also the form of a curve for which the period of an object in descent on the curve does not depend on the object's starting position. The cycloid has been
Butterfly on a Wheel Butterfly on a Wheel Butterfly on a Wheel (US: Shattered, Europe: Desperate Hours) is a 2007 British–Canadian mystery thriller film directed by Mike Barker, co-produced and written by William Morrissey, and starring Pierce Brosnan, Gerard Butler, and Maria Bello. The film's title is an allusion to a line of Alexander Pope's poem "Epistle to Dr Arbuthnot": "Who breaks a butterfly upon a wheel?" The line is usually interpreted as questioning why someone would put great effort into achieving something minor or unimportant, or who would punish a minor offender with a disproportional punishment. Chicago residents Neil Randall (Gerard Butler) and