Lever the power out, and the ratio of output to input force is given by the ratio of the distances from the fulcrum to the points of application of these forces. This is known as the "law of the lever." The mechanical advantage of a lever can be determined by considering the balance of moments or torque, "T", about the fulcrum. where F is the input force to the lever and F is the output force. The distances "a" and "b" are the perpendicular distances between the forces and the fulcrum. Since the moments of torque must be balanced, formula_3 .
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