Lever a place to stand, and I shall move the Earth with it' is a remark of Archimedes who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria). It is assumed that in ancient Egypt, constructors used the lever to move and uplift obelisks weighing more than 100 tons. A lever is a beam connected to ground by a hinge, or pivot, called a fulcrum. The ideal lever does not dissipate or store energy, which means there is no friction in the hinge or bending in the beam. In this case, the power into the lever equals
Darcy Lever Darcy Lever Darcy Lever is an area of the Metropolitan Borough of Bolton in Greater Manchester, England. Historically part of Lancashire, the area lies on the B6209 (Radcliffe Road), between Bolton and Little Lever. Its history dates to the time of William the Conqueror when it was part of the Salford Hundred given to Roger of Poitou for his participation in the Norman conquest of England. Lever was recorded as Parua Lefre in 1212, from the Latin, parva meaning little and laefre, which is derived from the Old English meaning 'place where the rushes grow'. The name was recorded in