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"
Harold Lever, Baron Lever of Manchester Harold Lever, Baron Lever of Manchester Norman Harold Lever, Baron Lever of Manchester, PC (15 January 1914 – 6 August 1995) was a British barrister and Labour Party politician. He was born in Manchester, the son of a textile merchant from Lithuania, he was educated at Manchester Grammar School and Manchester University. He was called to the Bar of the Middle Temple in 1935. During World War II he served in the Royal Air Force. His brother was Leslie Lever, Baron Lever. Lever was elected Member of Parliament for Manchester Exchange at the 1945 general election, then Manchester, Cheetham from