File:Four pulleys.svg

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This image was selected as picture of the day on Wikimedia Commons for 24 March 2008. It was captioned as follows:

English: Pulley diagram with 4 pulleys

Other languages:

Afrikaans: Katrolhefbome skematies voorgestel in vier konfigurasies

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.

Bosanski: Dijagram sa četiri kotura.

Čeština: 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.

Français : Schémas comparatifs d'une poulie simple et de palans à 2, 3 et 4 brins.

Hrvatski: Dijagram kolotura s četiri kolotura.

Íslenska: Skýringarmynd sem sýnir talíu með allt að fjórum trissum.

Italiano: Diagramma con carrucole multiple.

Magyar: Csigasor diagram 4 csigával

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.

Suomi: Kaaviokuva neljästä taljasta

Svenska: Illustration av hur block och taljor fungerar.

Беларуская: Схема працы блокаў і паліспастаў.

मराठी: कपी पध्दत रेखाचित्र चार कपी दर्शवीत.

한국어: 4개의 도르래가 있는 그림.

日本語： 4つの滑車図形

中文：四滑轮图解

中文（繁體）：四滑輪圖解

العربية : مخطّط بكرة بـ 4 بكرات

Summary

DescriptionFour pulleys.svg	العربية: أربع أمثلة مختلفة لأنظمة الحبل والبكرة. English: Pulley diagram with 4 pulleys. Suomi: Kaaviokuva neljästä taljasta. 中文：四滑轮图解。这是一个理想状态。实际上每增加一个滑轮都会增加滑轮组自重，同时也带来更大的摩擦阻力。 Nederlands: Katroldiagram met vier katrollen Español: Diagrama de 4 poleas. Deutsch: Flaschenzugdiagramm mit vier Flaschenzügen.
Date	2 September 2006
Source	Own work
Author	Prolineserver, Tomia (minor edits by Stanisław Skowron, scale adjusted by Atropos235)
Other versions	Derivative works of this file: Four pulleys FH.svg Pulleys.svg, Three pulleys.svg
SVG development InfoField	The SVG code is valid. This diagram was created with Inkscape …important. This diagram uses embedded text that can be easily translated using a text editor.

Summary

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

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.

	This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.

	You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
	This licensing tag was added to this file as part of the GFDL licensing update.CC BY-SA 3.0truetrue

This file is licensed under the Creative Commons Attribution 2.5 Generic license.

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File history

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	Date/Time	Dimensions	User	Comment
current	19:57, 14 September 2008	1,565 × 685 (113 KB)	Prolineserver	fixed positions of layers at the masses and fixed positions of hooks
	17:22, 1 April 2008	1,565 × 685 (113 KB)	Atropos235
	10:28, 15 September 2006	1,566 × 695 (112 KB)	Prolineserver	problem fixed: back to text, curve was to bold
	08:41, 13 September 2006	1,566 × 695 (117 KB)	Ss181292	minor edit: text -> curve (problems between MW and Inkscape)
	08:38, 13 September 2006	1,566 × 695 (107 KB)	Ss181292	minor edit: 33 N -> 33 1/3 N
	13:26, 2 September 2006	1,566 × 695 (107 KB)	Prolineserver	sigma erstmal weg
	11:05, 2 September 2006	1,596 × 695 (107 KB)	Prolineserver	Beschrifungen ergaenzt
	08:40, 2 September 2006	1,559 × 695 (107 KB)	Prolineserver	== Summary == {{Information\| \|Description = Pulley diagram with 4 pulleys \|Source = self-made \|Date = 2006-09-02 \|Author = User:Prolineserver, User:Tomia \|Permission = Licenced GFDL and CC-BY-2.5 \|other_versions = Image:Pulleys.svg, [[:Image