If one was to make a pulley to lift something massive like a ship, I am assuming the masses involved of the ship and the counterweight, will mean decreased efficiency due to : 1. Higher friction between in the sheave and axel area. 2. larger cable/robe mass on the longer end (once the pulley moves more one dir'n) 3. larger rope causing bending around the pulley. Questions: 1. What is the loss of efficiency with a larger pulley system requirement like this? 2. What are possible advantages of a larger pulley system in terms of efficiency? For instance, i read that a larger diameter pulley can result in a large increase in efficiency for a pulley system. Thanks.