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
William Lever, 1st Viscount Leverhulme about advertising, "I know half my advertising isn't working, I just don't know which half." William Lever, 1st Viscount Leverhulme William Hesketh Lever, 1st Viscount Leverhulme (; 19 September 1851 – 7 May 1925) was an English industrialist, philanthropist, and politician. Having been educated at a small private school until the age of nine, then at church schools until he was fifteen; a somewhat privileged education for that time, he started work at his father's wholesale grocery business in Bolton. Following an apprenticeship and a series of appointments in the family business, which he successfully expanded, he began manufacturing Sunlight