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
Évelyne Lever specifically for an American audience. She continues to write on and about 18th-century history. French English Évelyne Lever Évelyne Lever (known simply in English as Evelyne Lever) is a contemporary French historian and writer. She was married to a French historian, Maurice Lever, who is the author of "Sade". Lever was previously a research engineer at CNRS, and then began to focus more on 18th-century history. In particular, she focuses on certain people, including Louis XVI, Marie Antoinette and Madame de Pompadour. "Marie Antoinette: The Last Queen of France" was her first book to be published in the United States.