Question

why is the efficiency of a real life machine always less than 100 present ? give two examples​

Answer 1

Explanation:

Machine Efficiency

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work). 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.

Answer 2

Answer:

Machine Efficiency

☑ Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work).

more info:

☑ 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

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