A pulley is one of the original simple machines. The pulley was possibly created by Archimedes in B.C. times. Its original use was to lift buckets of water. The term sheave can also be used to refer to a pulley.
A simple machineis a basic mechanical device that helps you perform work. All six types of simple machines can most likely be found around your house. Explore simple machine examples to see which types of machines you use every day.