|
Include What, When, Where, how, and, Why ... It was not really invented it was discovered along with the wheel. It was Archimedes that mathermatically formulated lever and pulley idea of mechanical advantage by the Use of the Gravitational phenomena.
|
answers.yahoo.com/question/index?qid=20071117064312AABs...
answers.yahoo.com/question/index?qid=20071117064312AABsgQK
|
|
|
Who knows? The lever is the simplest of the simple machines. It likely was invented (or usefulness discovered) over and over again by many cultures throughout the ages.
http://answers.yahoo.com/question/index?qid=20090113054...
|
|
|
Archimedes invented the water screw, a device for raising water using an encased screw open at both ends. The screw is set an an angle, and as the ... Among his many accomplishments was the first description of the lever (around 260 BC). Levers are one of the basic tools; they were probably used in prehistoric times.
|
www.enchantedlearning.com/inventors/1300.shtml
www.enchantedlearning.com/inventors/1300.shtml
|
|
|
Article covering the life and works of the mathematician. Includes pictures of his inventions. ... He also invented things such as the hydraulic screw - for raising water from a lower to a higher level, catapult, the lever, the compound pulley and the burning mirror.
|
www.crystalinks.com/archimedes.html
|
|
Lever - Wikipedia, the free encyclopedia
|
|
In physics, a lever (from French lever , "to raise", c.f. a levant ) is a rigid object that is used with an appropriate fulcrum or pivot point to multiply the mechanical force that can be applie...
en.wikipedia.org/wiki/Lever
|
|
|
Subject: When was the lever invented? ... Date: Thu Feb 10 20:42:09 2000; Posted by John; Grade level: K-3 School: osburn; City: silverton State/Province: ID Country: U.S.A; Area of science: Science History; ID: 950236929.Sh...
|
www.madsci.org/posts/archives/feb2000/950816300.Sh.q.ht...
www.madsci.org/posts/archives/feb2000/950816300.Sh.q.html
|
|
|
No one really knows when (or by whom) the lever was invented. It's a little bit like the fact no one really knows who invented the wheel. It is more likely that a person (a little boy, perhaps?) discovered the lever, just like someone discovered fire...
|
www.madsci.org/posts/archives/feb2000/950816300.Sh.r.ht...
www.madsci.org/posts/archives/feb2000/950816300.Sh.r.html
|
|
A simple example of a machine is using a lever to lift a weight and overcome the force of gravity. According to the placement of the lever fulcrum, the input or effort force would be less the than that required to life the load.
|
www.school-for-champions.com/science/machines.htm
|
|
So the king of the city asked Archimedes for help . Archimedes had just invented the lever and he combinated levers and pullies to make cranes to stop the enemy.
|
mathsforeurope.digibel.be/Archimedes.htm
|
|
