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2018-7-3 A Rube Goldberg machine is a machine intentionally designed to perform a simple task in an indirect and overcomplicated fashion. Often, these machines consist of a series of simple devices that are linked together to produce a domino effect, in which each device triggers the next one, and the original goal is achieved only after many steps.
2018-7-7 Simple machines are very basic mechanical tools that help make work easier. There are six simple machines: lever, wheel and axle, pulley, wedge, inclined plane, and screw. Scissors are made of two kinds of simple machines: the blades are wedges, and the handles of the scissors are levers. The place ...