Lever resistance (or load). It is common to call the input force "the effort" and the output force "the load" or "the resistance." This allows the identification of three classes of levers by the relative locations of the fulcrum, the resistance and the effort: These cases are described by the mnemonic "fre 123" where the fulcrum is in the middle for the 1st class lever, the "r"esistance is in the middle for the 2nd class lever, and the effort is in the middle for the 3rd class lever. The lever is a movable bar that pivots on a fulcrum attached to
Darcy Lever several ways, whilst the spellings differ the pronunciation was similar to 'lever' – Lethre 1221; Leuere 1278; Leuir 1282; Leuer 1291 and Leyver 1550. Initially, Lever was the name for the hamlets comprising the manor of Lever. In 1509 it became Darcye Lever, the distinguishing affix coming from possession by the D'Arcy family. "NOTE : Until 1509 the area called Darcy Lever today was part of the Manor of Little Lever. In the text, where the name is given in italicised text with square brackets, it refers to the area of Darcy Lever before it gained that name." Darcy Lever