- published: 19 Nov 2015
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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.
Anupam Kher (born 7 March 1955) is an Indian actor who has appeared in nearly 450 films and 100 plays. Though mainly appearing in Bollywood films, he has had roles in some films from other nations as well. He has held the post of Chairman of the Censor Board and National School of Drama in India.
Anupam Kher was born into a Kashmiri Pandit family and lived in Shimla and was educated at D.A.V. School there. He is an alumnus and a former chairperson of the National School of Drama. Some of his early acting was in plays performed at the Himachal Pradesh University.
Kher made his acting debut in the 1982 Hindi movie Aagman. Then in 1984 came Saaransh, where 28-year old Kher played a retired man who has lost his son. He hosted TV shows such as Say Na Something To Anupam Uncle, Sawaal Dus Crore Ka and the recent Lead India. He has had many comic roles but has also played the villain such as his acclaimed role as terrorist Dr. Dang in Karma (1986). For his role in Daddy (1989) he received the Filmfare Critics Award for Best Performance. Kher has won the Filmfare Award for Best Performance in a Comic Role five times, more than any other actor.
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