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Furkat [3]
4 years ago
8

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%
Physics
2 answers:
erastova [34]4 years ago
8 0

Answer:

55%

Explanation:

Delicious77 [7]4 years ago
4 0

power out / power in so 230/420 = 0.547619048 using sigfiges its about .55 or 55%

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