Pulley: Difference between revisions
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| [[fixed pulley with vertical loads]] || [[File: | | [[fixed pulley with vertical loads]] || [[File:Fixedpulleywithverticalloads.png|300px]] | ||
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| [[pulley system on a double inclined plane]] || [[File:Pulleysystemondoubleinclinedplane.png|300px]] | | [[pulley system on a double inclined plane]] || [[File:Pulleysystemondoubleinclinedplane.png|300px]] | ||
Latest revision as of 00:02, 13 August 2011
Definition
The term pulley or pulley system is used for any of a number of related simple machines, having the following features:
- A rotatable wheel.
- A rope or belt or string passing over and around the wheel, and curving over it, so that linear motion of the rope corresponds to rotation of the wheel.
A pulley is a simple machine that works by changing the direction -- the direction in which the rope hangs at one end can differ from the direction in which the rope hangs at the other end, allowing the application of a force in one direction to move a load in another direction.
Here are some examples of pulley systems in action:
| Scenario | Picture |
|---|---|
| fixed pulley with vertical loads | 
|
| pulley system on a double inclined plane | 
|
| pulley system for block piled on block | File:Pulleysystemforblockpiledonblock.png |
