Mathematics, 23.05.2020 07:01 ugh788o02

A person does 50 J of work to lift a crate using a pulley. The pulley's work output
is 42 J. What is the pulley's mechanical efficiency? *

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A person does 50 J of work to lift a crate using a pulley. The pulley's work output
is 42 J. W...

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