Palanca

This video tutorial introduces levers as simple machines that help lift or move loads. It explains the concept of a lever, which is a rigid bar rotating around a fixed point called a fulcrum. The video covers the three classes of levers: first-class, where the fulcrum is in the center; second-class, where the fulcrum is at one end; and third-class, where the fulcrum is at one end with the effort applied in the middle. Examples of each class are provided, such as scissors, staplers, and baseball bats. The tutorial concludes by encouraging viewers to think about levers in the human body.

What is a lever and how does it function?

What is the role of the fulcrum in a lever system?

Describe the three classes of levers and provide examples for each.

How do levers make it easier to lift or move objects?

Can you identify parts of your body that act as levers? Explain.