Lever

Lever
Palanca-ejemplo.jpg
Levers can be used to exert a large force over a small distance at one end by exerting only a small force over a greater distance at the other.
ClassificationSimple machine
IndustryConstruction
WeightMass times gravitational acceleration
Fuel sourcepotential and kinetic energy (mechanical energy)
Componentsfulcrum or pivot, load and effort
Examplessee-saw, bottle opener, etc.

A lever (ər/ or US: ər/) is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the location of fulcrum, load and effort, the lever is divided into three types. It is one of the six simple machines identified by Renaissance scientists. 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 mechanical advantage of the lever.

Etymology

The word "lever" entered English about 1300 from Old French, in which the word was levier. This sprang from the stem of the verb lever, meaning "to raise". The verb, in turn, goes back to the Latin levare, itself from the adjective levis, meaning "light" (as in "not heavy"). The word's primary origin is the Proto-Indo-European (PIE) stem legwh-, meaning "light", "easy" or "nimble", among other things. The PIE stem also gave rise to the English word "light".[1]

Other Languages
Afrikaans: Hefboom
Alemannisch: Hebel (Physik)
አማርኛ: መፈንቅል
العربية: رافعة
aragonés: Palanca
asturianu: Lleva
azərbaycanca: Ling
беларуская: Рычаг
беларуская (тарашкевіца)‎: Рычаг
български: Лост
bosanski: Poluga
català: Palanca
Чӑвашла: Кӳсек
čeština: Páka
Cymraeg: Trosol
eesti: Kang
Ελληνικά: Μοχλός
español: Palanca
Esperanto: Levilo
euskara: Palanka
فارسی: اهرم
galego: Panca
한국어: 지레
հայերեն: Լծակ
हिन्दी: उत्तोलक
hrvatski: Poluga
Ido: Levero
Bahasa Indonesia: Tuas
íslenska: Vogarstöng
italiano: Leva (fisica)
ქართული: ბერკეტი
қазақша: Иінтірек
Kiswahili: Wenzo
Kreyòl ayisyen: Levye
Latina: Vectis
latviešu: Svira
lietuvių: Svertas
la .lojban.: vraga
magyar: Emelő
македонски: Лост
മലയാളം: ഉത്തോലകം
Bahasa Melayu: Tuas
Nederlands: Hefboom
नेपाल भाषा: थिँभः
日本語: てこ
нохчийн: Зеразакъ
norsk: Vektstang
norsk nynorsk: Vektstong
oʻzbekcha/ўзбекча: Richag
Patois: Liiva
polski: Dźwignia
português: Alavanca
română: Pârghie
Runa Simi: Wanqhana
русский: Рычаг
Scots: Lever
shqip: Llozi
Simple English: Lever
slovenčina: Páka
slovenščina: Vzvod
српски / srpski: Полуга
srpskohrvatski / српскохрватски: Poluga
suomi: Vipu
svenska: Hävstång
Tagalog: Dalawit
తెలుగు: తులాదండము
Türkçe: Kaldıraç
українська: Важіль
vèneto: Leva
Tiếng Việt: Đòn bẩy
文言: 杠杆
Winaray: Ligwát
吴语: 杠杆
粵語: 槓桿
中文: 杠杆