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![]() edHelper.com Simple Machines |
Complex Machines |
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| Flesch-Kincaid grade level: | 7.32 |
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Complex Machines
By Sharon Fabian |
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1 Let's say you already know about the six simple machines: inclined plane, wedge, screw, lever, wheel and axle, and pulley. You've probably figured out that these six machines were invented ages and ages ago. So what has been happening since then? Did someone invent simple machine number 7, 8, 9, 10, and so on? How many simple machines do we have by now? Hundreds? Thousands?