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प्रश्न
How does a machine work?
थोडक्यात उत्तर
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उत्तर
A machine does some useful work when energy is supplied to it.
Energy supplied to machine (or input) = Effort × Displacement of the point of application of effort.
Work obtained from a machine (or output) = Load × Displacement of the point of application of load.
For an ideal machine, Work output = Work input.
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