What are the uses of pulleys?
A pulley consists of one or more pulleys and a rope or a cable. It is commonly used to lift very heavy objects. Consider the following scenario: You are flying a kite on a beautiful day and it gets tangled up in an extremely tall tree. You don’t have a ladder, but you need to retrieve your kite. A lady walks out of her home and asks if you need help. She too doesn’t have a ladder, but she does have a pulley!
- How could you use the pulley to get your kite?
- Describe how efficient your system is.
- In this case, would a ladder or a pulley be better?
- What kind of a machine is a pulley an example of?