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maxonik [38]
4 years ago
13

A person does 50j of work to lift a crate using a pulley. The plley's work output is 42j. What is the pulleys mechanical efficie

ncy?
Physics
1 answer:
ruslelena [56]4 years ago
8 0
(42/50)*100=84%

Because efficiency =(Useful/total)*100

Hope this helps!
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