What is a simple machine ?
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Simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work. ... The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.
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A machine is a device that helps us to do work with less effort in less time. A simple machine has few or no moving parts. Simple machines are basically classified into two groups, levers and inclined planes. Simple machines like the pulley, screw, wheel and axle and wedge come under these two categories.
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