Thirteen. How Leverage Works
How do you move a mountain?
In days of yore, prior to the industrial age, a block and tackle pulley system proved to be an effective method to lift a heavy load. Even with the advent of backhoes, bulldozers, and other modern machinery, this ingenious device can still be found combating the laws of physics today. If you’ve ever seen (or used) an engine lift or the rigging of a sailboat, you’ve witnessed a block and tackle system. A combination of strategically placed ropes and pulleys evenly distribute weight in a manner that allows an individual or group to lift a load far beyond what their strength and numbers would ...
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