Question

a force of 50N needed to raise 240N load with a pulley system the load goes up 1m for every 5m of rope pulled through the pulleys what is the efficiency of the system

Answer 1

Answer:

If you pull the rope 5 m to raise the load 1 m, then the mechanical advantage is 5:1. Without friction, the force needed would be 60/5 = 12 newtons. If you actually need 240 newtons, your efficiency is 12/240 = 5%. It may be time for new pulleys!