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Mechanical Systems
A collection of resources on how humans use machines and tools to meet their needs. Covers simple and complex machines, subsystems that transfer forces, mechanical advantage, speed ratio, the effect of friction, efficiency, the science...
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Technology Resources: Resources Are Things We Need to Get a Job Done [Pdf]
Resources are things we need to get a job done. Every technological system makes use of seven types of resources: people, information, materials, tools and machines, energy, capital, and time.