Do machines create less work? Example: pulley system

Technically, no the work of building machines is hard but in the long run, Yes they are easier after they're built.

Explanation:

c.is a substance that requires a small amount of energy per gram to raise its temperature; has strong cohesive forces between molecules.

explanation:

a colorless, transparent, odorless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.