The pulley system consists of one or more pulleys and a rope or a cable. The number of pulleys used may increase or decrease the mechanical advantage of the...
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library.thinkquest.org/27948/pulley.html
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When two or more pulleys are connected together, they permit a heavy load to be lifted with less force. The trade-off is that the end of the rope must move a greater distance than the load. Wedge; A wedge converts motion in one direction into a Though these devices were also used in machines in Leonardo's time,
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www.mos.org/sln/Leonardo/InventorsToolbox.html
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History of Science question: What can pulleys be used for? a mechanical advantage as far as lifting.
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wiki.answers.com/Q/What_can_pulleys_be_used_for
wiki.answers.com/Q/What_can_pulleys_be_used_for
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Inventions question: What are pulleys used for? removing genital warts aka james.
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wiki.answers.com/Q/What_are_pulleys_used_for
wiki.answers.com/Q/What_are_pulleys_used_for
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Pulley: This simple machine is made up of a wheel and a rope. The rope fits on the groove of the wheel. Pulleys let you move loads up, down, or sideways. Pulleys are good for moving objects to hard to reach places. It also makes the work of moving heavy loads a lot easier. Examples of where pulleys can be used:
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www.coe.uh.edu/archive/science/science_lessons/sciencel...
www.coe.uh.edu/archive/science/science_lessons/scienceles1/pulley.htm
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Pulleys are used to lift items from one level to another. Pulleys can be fixed or movable or combinations of both. Pulleys are used in block and tackles, large cranes, chain hoists, and hydraulic systems.
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www.ftschool.org/fourth/science/simple_machines.html
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Pulley Belt and Gear Packaged Used - This package is perfect for use in large robots or machines. It consists of a brand new double sided type pulley belt...
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www.goldmine-elec-products.com/prodinfo.asp?number=G136...
www.goldmine-elec-products.com/prodinfo.asp?number=G13689
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If you have ever looked at the end of a crane, or if you have ever used an engine hoist or a come-along, or if you have ever looked at the rigging on a sailboat, then you have seen a block and tackle at work. A block and tackle is an arrangement of rope and pulleys that allows you to trade force for distance.
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www.howstuffworks.com/pulley.htm
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There are SIX simple machines: Monday, November 16, 2009 ; Simple machines make work easier for us by allowing us to push or pull over increased distances.
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www.mikids.com/Smachines.htm
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