The output energy of a real life machine is always less than the input energy.
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Machine Efficiency
The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, efficiency is always less than 100 percent. The closer to 100 percent a machine's efficiency is, the better it is at reducing friction.
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Because some of the work input to a machine is always used to overcome friction, the work output of a machine is always less than the work input
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