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
The Rolling Bridge which may still be seen at Fort Nelson, Portsmouth. Certain types of bascule bridges roll on an arc; an example is the Pegasus Bridge. The Rolling Bridge The Rolling Bridge is a type of curling movable bridge completed in 2004 as part of the Grand Union Canal office and retail development project at Paddington Basin, London. Despite the connotation of its name, it is more accurately described as ""curling"". The Rolling Bridge was conceived by Thomas Heatherwick. The bridge consists of eight triangular sections hinged at the walkway level and connected above by two-part links that can be collapsed towards