Answer to Question #18437 in Mechanics | Relativity for Janice
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?