Mochalav6991 Mochalav6991

28-09-2017
Physics

contestada

What is the efficiency of a machine that miraculously converts all the input energy to useful output energy?

Respuesta :

03-10-2017

A perfectly efficient machine can only be 100% efficient.

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samuelonum1 samuelonum1

28-03-2020

Answer: 100%

Explanation:

Efficiency = output/input = 100/100 x 100 = 100% efficient

Machines are not 100% efficient because some of the work done by a machine is used to overcome friction. So work output is always less than work input.

Work: Done by machines is calculates as Mechanical Efficiency which is Work Output divided by Work Input.

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