Lever Lever A lever ( or ) is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the location of fulcrum, load and effort, the lever is divided into three types. It is one of the six simple machines identified by Renaissance scientists. A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage
Hayley Lever with arthritis in his right hand, which prevented him from further travel and forced him to concentrate on still-life subjects instead. As his arthritis advanced, he taught himself to paint with his left hand. However, following the death of his wife Aida in 1949, Lever was confined to his home, where he continued to paint from 1953 until his death. Hayley Lever died on 6 December 1958 at his home in Mount Vernon, New York. News of his death surprised some: Lever had all but disappeared from public view over two decades earlier, despite once having been enormously popular and