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Answer on Mechanics | Relativity Question for Janice

Question #18437
A pulley system with 76% efficiency is set up to lift a 18kg bag of nails. The bag is lifted to a height of 2.1m by a person pulling on the rope with a force of 58.0N.

1) What is the work done on the bag of nails by the pulley?

2) How much work is input to the system?
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