Lever resistance (or load). It is common to call the input force "the effort" and the output force "the load" or "the resistance." This allows the identification of three classes of levers by the relative locations of the fulcrum, the resistance and the effort: These cases are described by the mnemonic "fre 123" where the fulcrum is in the middle for the 1st class lever, the "r"esistance is in the middle for the 2nd class lever, and the effort is in the middle for the 3rd class lever. The lever is a movable bar that pivots on a fulcrum attached to
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