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A fascinating article that describes how a block and tackle (as well as levers and gears) works! ... You can see that a block and tackle, a lever, a gear train and a hydraulic system all do the same thing: they let you magnify a force by proportionally diminishing the distance through which the magnified force can act.
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www.howstuffworks.com/pulley1.htm
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Block and tackle - Wikipedia, the free encyclopedia
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A block and tackle is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift or pull heavy loads. Although used in many situations, they are especially comm...
en.wikipedia.org/wiki/Block_and_tackle
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How to Build a Block and Tackle Hoist. A block (a wood or metal unit containing one or more pulleys) and tackle (an assembly of blocks and ropes) permits multiplication of force to lift or move heavy objects. This amazingly simple... ... How to Make a Block & Tackle...
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www.ehow.com/how_1276_build-block-tackle.html
www.ehow.com/how_1276_build-block-tackle.html
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(Click to enlarge) block and tackle Half the pull () is required to lift the weight () with a two single-block and tackle unit ... Dictionary: block and tackle...
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www.answers.com/topic/block-and-tackle
www.answers.com/topic/block-and-tackle
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On the right is the simplest block and tackle. These are considered to be two of the "simple machines" (along with the wheel, lever, inclined plane, wedge, and screw). The block and tackle that you see here allows us to lift twice the weight with the same force as with the simple pulley, but we only lift it half as far.
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www.jimloy.com/cindy/block.htm
www.jimloy.com/cindy/block.htm
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Describe the advantage of block and tackle afloat and ashore ... In the Navy you’ll rig a block and tackle to make some of your work easier. Learn the names of the parts of a block. Figure 2-1 will give you a good start on this. Look at the single block and see some of the ways you...
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www.tpub.com/machines/2.htm
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Step 1. Determine the friction for the block and tackle. Step 2. Determine the total weight to be lifted. Step 3. Determine the SHP of the block and tackle. Step 4. Apply the BS formula to compute the BS of the block and tackle.
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www.globalsecurity.org/military/library/policy/army/fm/...
www.globalsecurity.org/military/library/policy/army/fm/55-17/ch6.htm
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I am seeking a simple, clear and concise explanation of how the block and tackle works. How can a system of such pulleys increase the amount of weight lifted by a given amount of energy, or reduce the amount of energy needed to lift a given amount of weight?
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www.mcasco.com/qa_batma.html
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