Question

the output energy of a real life machine is less than input energy because of​

Answer 1

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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. The percentage of the work input that becomes work output is the efficiency of a machine.

Answer 2

Answer:

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. The percentage of the work input that becomes work output is the efficiency of a machine.