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 .
Little Lever only large house in the village which contained 9 hearths. The manor house, Little Lever Hall, built of wood and plaster was destroyed in the 18th century. It was a seat of the Levers in 1567 and after that the Andrews who inherited the Lever's estate in Rivington. There is a record of a coal pit in 1320. Records show there were fulling-mills in Little Lever before 1559. The holding of Adam Byrom of Salford who died in 1559 was described as "an estate of eight messuages, a moiety of two fulling-mills etc., in Little Lever", his three-year-old grandson Ralph,