Physics, asked by prasasthasaroline18, 6 months ago

The efficiency of an electric motor is 20 %. When lifting a body 500 J of energy are wasted. What is the useful work done by the motor?

Answers

Answered by Anonymous

5

Answer:

Eff. = Eo/Ei = 0.2.

Eff. = Eo/(Eo+500) = 0.2.

Eo = 0.2Eo+100,

0.8Eo = 100,

Eo = 125J. = Energy out = Useful work.

Explanation:

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