Lever force F at a point "A" located by the coordinate vector r on the bar. The lever then exerts an output force F at the point "B" located by r. The rotation of the lever about the fulcrum "P" is defined by the rotation angle "θ" in radians. Let the coordinate vector of the point "P" that defines the fulcrum be r, and introduce the lengths which are the distances from the fulcrum to the input point "A" and to the output point "B", respectively. Now introduce the unit vectors e and e from the fulcrum to the point "A"
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