Ныв:Four pulleys.svg

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[edit] Summary

[edit] Description

• F_Z = Rope tension or effort force
• F_L = Load or resistance force
• s = Rope displacement (distance pulled) or effort distance
• h = Height (distance load is raised) or resistance distance

An illustration showing how pulleys are used to obtain a mechanical advantage. Using additional pulleys decreases the force required but increases the distance required to raise a load the same amount. In each instance here the mechanical work done is the same, work being the product of force and distance.

• F_Z × s = F_L × h
  • 10 cm × 100 N = 10 J
  • 20 cm × 50 N = 10 J
  • 30 cm × 33 1/3 N = 10 J
  • 40 cm × 25 N = 10 J

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This image was selected as a picture of the day for March 24, 2008. It was captioned as followed: English: Pulley diagram with 4 pulleys العربية: مخطّط بكرة بـ 4 بكرات Asturianu: Un diagrama amosando cuatro menes d'aperiar les polees. D'izquierda a drecha, amuésase que la fuercia pa allevantar la mesma masa, amenorga según s'amesten más polees. Беларуская: Схема працы блокаў і паліспастаў. Česky: Schematické znázornění rozložení sil na jednoduchém stroji - kladce. Dansk: Diagram over fire forskellige taljer. Deutsch: Diagramm verschiedener Flaschenzüge English: Pulley diagram with 4 pulleys Español: Un diagrama mostrando cuatro tipos de poleas. De izquierda a derecha, para una misma masa (peso) la fuerza ejercida para levantarla disminuye. Euskara: Poleen diagrama. Suomi: Kaaviokuva neljästä taljasta Français : Schémas comparatifs d'une poulie simple et de palans à 2, 3 et 4 brins. Magyar: Csigasor diagram 4 csigával Íslenska: Skýringarmynd sem sýnir talíu með allt að fjórum trissum. Italiano: Diagramma con carrucole multiple. 日本語: 4つの滑車図形 한국어: 4개의 도르래가 있는 그림. Nederlands: Katroldiagram met vier katrollen Polski: Diagram z czterema wielokrążkami. Português: Um diagrama mostrando quatro tipos de arranjos de polias. Sendo que da esquerda para a direita para uma mesma massa (peso) a força exercida para ergue-la diminiu. Svenska: Illustration av hur block och taljor fungerar. ‪中文(简体)‬: 四滑轮图解 ‪中文(繁體)‬: 四滑輪圖解

[edit] Licensing

I, the copyright holder of this work, hereby publish it under the following licenses: Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation license". Aragonés | العربية | Asturianu | Български | বাংলা | ইমার ঠার | Brezhoneg | Bosanski | Català | Sinugboanong Binisaya | Česky | Dansk | Deutsch | Ελληνικά | English | Esperanto | Español | Eesti | Euskara | فارسی | Suomi | Français | Gaeilge | Galego | עברית | Hrvatski | Magyar | Bahasa Indonesia | Ido | Íslenska | Italiano | 日本語 | ქართული | ភាសាខ្មែរ | 한국어 | Kurdî / كوردي | Latina | Lëtzebuergesch | Lietuvių | Bahasa Melayu | Nnapulitano | Nederlands | Norsk (nynorsk) | Norsk (bokmål) | Polski | Português | Română | Русский | Slovenčina | Slovenščina | Shqip | Српски | Svenska | తెలుగు | ไทย | Türkçe | Українська | اردو | Tiếng Việt | Volapük | Yorùbá | 中文(简体) | 中文(繁體) | +/- This file is licensed under Creative Commons Attribution 2.5 License In short: you are free to distribute and modify the file as long as you attribute its author(s) or licensor(s). You may select the license of your choice.