You have designed a machine that requires 1000 J of work from a motor for every 800 J of useful work done by the machine. What is the efficiency of the machine?

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asked Oct 14, 2022 133k views

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You have designed a machine that requires 1000 J of work from a motor for every 800 J of useful work done by the machine. What is the efficiency of the machine?

Physics
high-school

Avnesh Shakya asked

by Avnesh Shakya

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1 Answer

3 votes

Answer:

80%

Step-by-step explanation:

$efficiency = (useful \: work \: done)/(total \: energy \: input)$

800 / 1000 = 0.8

Efficiency = 0.8 *100 = 80%

Tunc answered Oct 19, 2022

by Tunc

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