Contents • • • • • • • • • • Etymology [ ] The word 'lever' entered about 1300 from, in which the word was levier. This sprang from the stem of the verb lever, meaning 'to raise'. Paradise Kiss Movie Eng Sub more. The verb, in turn, goes back to the levare, itself from the adjective levis, meaning 'light' (as in 'not heavy'). The word's primary origin is the (PIE) stem legwh-, meaning 'light', 'easy' or 'nimble', among other things. The PIE stem also gave rise to the English word 'light'. Early use [ ] The earliest remaining writings regarding levers date from the 3rd century BCE and were provided. 'Give me 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 ).

It is assumed [ ] that in ancient Egypt, used the lever to move and uplift obelisks weighing more than 100 tons. Force and levers [ ]. • • Davidovits, Paul (2008). 'Chapter 1'.. Academic Press. • Uicker, John; Pennock, Gordon; Shigley, Joseph (2010). Theory of Machines and Mechanisms (4th ed.).

Oxford University Press, USA.. Harvard University Press (reprinted by Dover Publications 1988).

Retrieved 7 April 2013. External links [ ] Wikimedia Commons has media related to. Look up in Wiktionary, the free dictionary. • at Diracdelta science and engineering encyclopedia • by,. • at EnchantedLearning.com.

A lever that has the load between the fulcrum and the effort is known as a. Second order lever. Once again, the further away the effort is from the fulcrum and the load the greater the mechanical advantage of the lever. A lever that has the load between the fulcrum and the effort is known as a. Second order lever. A nutcracker is a 2 class lever because the load is in the middle. Share to: C3 Shooter. 83,866 Contributions. Why is nutcracker a second class lever? Nutcracker bottle opener. Wondershare Dr.fone Key Generator. Paper cutter. Second class levers are similar to first class levers. Second class levers always multiply the input force.