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Two movers use a rope system to lift a box to a third-story apartment. they do 1,200 j of work on the rope system, and the rope system does 1,020 j of work on the box. what is the efficiency of the rope
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3 votes
Two movers use a rope system to lift a box to a third-story apartment. they do 1,200 j of work on the rope system, and the rope system does 1,020 j of work on the box. what is the efficiency of the rope system?

User Bjoseph
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2 Answers

3 votes
efficiency = energy output / energy input
User Flash Sheridan
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6.3k points
5 votes

Efficiency = (1020 J / 1200 J) = 85%

User HouseCat
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6.1k points
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