Lever fulcrum to where the output force is applied (point "B"), then the lever amplifies the input force. On the other hand, if the distance "a" from the fulcrum to the input force is less than the distance "b" from the fulcrum to the output force, then the lever reduces the input force. The use of velocity in the static analysis of a lever is an application of the principle of virtual work. A lever is modeled as a rigid bar connected to a ground frame by a hinged joint called a fulcrum. The lever is operated by applying an input
Darcy Lever was living in 1246, ancestor of the Levers of Little Lever, who held a share of the manor until the beginning of the 17th century. In the Lever of Great Lever are charters referring to the Lever family. Adam de Lever and his son Ellis attested a grant; no. 45. Ellis son of Adam de Lever granted to William his son and his heirs a portion of his land in Little Lever. The bounds began at 'the Langcestre' (alias Hanycestre) where Denebrook fell into the great water called Lever (alias Letoce); ascended the brook to a ditch dividing Little Lever