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
Harry Lever Harry Lever Harold Lever (5 January 1886 – 19 July 1970) was an Australian rules footballer who played with St Kilda in the Victorian Football League (VFL). Lever played as a fullback in his 15-year VFL career which began in 1905. In 1907 he lost two fingers in a band saw accident but after attending to the wound himself, played for St Kilda the following afternoon. He did not play in 1916 or 1917 as St Kilda were in recess due to World War I, while he was injured in 1920 and missed the season. His total of 218 games