Question

A simple machine has efficiency 70% what is the meaning of statement ?

Answer 1

Answer:

First of we must know that , " 100% efficiency can never be attained from a source of energy provided to a machine or system".

so, from this statement we come to know this the maximum amount of work done by a machine with the provided source of energy. And the rest of the 30% will be utilized by the machine to get heated up or to start it work .

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Answer 2

Answer:

Efficiency of a machine is 70% this means that the total energy produced to the machine only 80% is useful and given as a output.



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