- published: 27 Apr 2012
- views: 135833
A lever ( /ˈlɛvər/ or UK /ˈliːvər/) is constructed from a beam attached to ground by a hinge, or fulcrum. It is one of the six simple machines identified by Renaissance scientists. The word comes from the French lever, "to raise", cf. a levant. 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 ideal mechanical advantage of the lever.
The earliest remaining writings regarding levers date from the 3rd century BC and were provided by Archimedes. "Give me a place to stand, and I shall move the Earth with a lever" 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 weighting 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 the power out, and the ratio of output to input force is given by the ratio of the distances from the fulcrum to the points of application of these forces. This is known as the law of the lever.
Actors: Jorge Montesi (actor), Paul Zaza (composer), Jorge Montesi (producer), Jorge Montesi (editor), Jorge Montesi (director), Jorge Montesi (writer), Mike Douglas (actor), Philip Spink (miscellaneous crew), Joseph Patrick Finn (actor), Peter Haynes (actor), Peter Haynes (writer), Peter Haynes (producer), Christine MacInnis (actress), Deryck Hazel (actor), Bryan Fustukian (actor),
Genres: Thriller,Actors: Pierre Laroche (writer), Roger Coggio (actor), Noël Roquevert (actor), Fernand Sardou (actor), Jacques Loussier (composer), Pierre Laroche (writer), Junie Astor (actress), Michel Bardinet (actor), Suzanne Dehelly (actress), Jeanne Fusier-Gir (actress), Georges Van Parys (composer), Simone Renant (actress), Gérard Séty (actor), Marguerite Beaugé (editor), Sophie Grimaldi (actress),
Genres: Crime,Actors: Cyril Smith (actor), Alfred Roome (editor), Tom Walls (director), Peter Gawthorne (actor), Sara Allgood (actress), Tom Walls (actor), Michael Balcon (producer), Mervyn Johns (actor), Martita Hunt (actress), Robertson Hare (actor), Ben Travers (writer), J.H. Roberts (actor), Roy Emerton (actor), Sam Wilkinson (actor), H.G. Stoker (actor),
Genres: Comedy, Crime,Turn the mirrors face the wall
Don't you feel a little weak?
And I'd catch you when you fall
But you're falling all the time
Do you need it anymore?
Or do you need a little more?
Living your life like a bull in the trade
He doesn't know how it feels
Under my thumb like a bone under nail
She's in the know, how's it feel?
Live your life under machine guns
Canary down the mine
Maybe I'm on the lever
Spoiling my broth like a radio kid
Programmed computerised minds
Waving my luck under your nose