Define machine and its uses in 50 words
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Answer:
A machine (or mechanical device) is a mechanical structure that uses power to apply forces and control movement to perform an intended action. ... They can also include computers and sensors that monitor performance and plan movement, often called mechanical systems.
Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities. Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever
Students (and many adults) commonly use the word 'machine' to describe complex mechanical devices powered by an engine or electric motor and designed to perform useful labour saving tasks. Students often believe that all machines produce much more work than their human operators put in
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