A pulley uses a wheel and a rope, cord, or chain. Pulleys help us lift things that are heavy. Here are some examples of pulleys at work.
Sailboats use pulleys. Pulleys help raise the sails, turn the boat, and more.
Pulleys help us build. Cranes use pulleys. So do other construction machines.
A rock climber wears a harness . It is attached to a person with a pulley. This helps keep the climber from falling if he or she slips.
Top of the Slopes
A ski lift takes people up ski slopes. It is made of many pulleys. One of them is huge! Take a look at it here.
Did You Know?
This is what a pulley looks like up close. Pulleys make it easier to lift heavy things. Can you think of other everyday examples of pulleys?