Block and Tackle

http://demonstrations.wolfram.com/BlockAndTackle/

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A block and tackle system consists of two or more pulleys threaded by ropes or cables, designed to gain mechanical advantage in lifting heavy loads. The principle of operation is easier to understand by showing the equivalent pulley system on the right ...

Contributed by: S. M. Blinder

Видео Block and Tackle канала Wolfram Demonstrations Project