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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? 190% 0.5% 183% 55%

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? 190% 0.5% 183% 55%
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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? 190% 0.5% 183% 55%

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User Voytez
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2 Answers

4 votes

Answer:

55%

Step-by-step explanation:

answered
User Sthenault
by
7.9k points
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power out / power in so 230/420 = 0.547619048 using sigfiges its about .55 or 55%

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User Dmcquiggin
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