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A mechanical device requires 420 J of work to do 230 J of work to lift a crate. What is the efficiency of the device? In percentage please.

Respuesta :

The efficiency is the energy output, divided by the energy input, and expressed as a percentage. Efficiency = (output energy / input energy) x 100 = 230/420 x 100 = 54.76.
pstnonsonjoku

The efficiency of the machine is  54.76%.

The efficiency of a machine refers to the amount of useful work that is done by the machine. Efficiency is usually expressed as a percentage.

From the question;

Work output= 230 J

Work input=  420 J

We know that efficiency = Work output/work input × 100/1

efficiency =230 J/420 J × 100/1

efficiency = 54.76%

Learn more: https://brainly.com/question/1054650

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