A pulley system with 75% efficiency is set up to lift a 21kg bag of nails. The bag is lifted to a height of 2.3m by a person pulling on the rope with a force of 91.5N. What is the work done on the bag of nails by the pulley?
1 Answer
Apr 18, 2016
Explanation:
Be careful with that bag !!
The person applies a total of
Hence the work done is: