Physics, 10.11.2021 17:20, bayeck

Using a lever, a person applies 80N of force and moves the lever 3 meters. This moves a 400 N rock at the other end by 0.6 meters. What is the efficiency of the machines?

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Using a lever, a person applies 80N of force and moves the lever 3 meters. This moves a 400 N rock a...