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
Lever House project included the addition of marble benches and an Isamu Noguchi sculpture garden to the building's plaza – elements in the original plans for the building which were never realized. In 2003, Lever House Restaurant became the first business to operate as a restaurant at Lever House and later won "New York Magazine"'s Best Service award in 2004. Lever House Restaurant closed in early 2009. As of October 2009, restaurant Casa Lever occupies the former Lever House Restaurant space. Aluminum producer Alcoa is headquartered in Lever House. As of 2005, the building's tenants included Thomas Weisel Partners LLC, which maintains