Title: Pulleys, Forces and Distances
Introduction:
Pulleys have been around for hundreds of years. The ancient Greeks even had pulleys. Pulleys have been around so long that nobody knows when they were invented.
Pulleys are used for:
- Ships for lifting cargo and sails
- Lifting heavy things
- Changing the direction of the pull
- Lifting logs and other heavy stuff
- On cranes for lifting heavy building materials
Question:
Why are pulleys useful?
Hypothesis:
I think that pulleys will make a big difference when I lift something.