What is a lever? A lever is a rigid bar that is supported at one point. This is point is called the fulcrum. There are three classes of levers, classified by the locations of the fulcrum, the force or effort, and the load.
These are levers. On the left is a picture of the 3 classes of levers and on the right is one of many examples of a lever. It is labled with the fulcrum, the effort, and the load
What is a lever?
A lever is a rigid bar that is supported at one point. This is point is called the fulcrum. There are three classes of levers, classified by the locations of the fulcrum, the force or effort, and the load.
For a video about levers click here:
http://www.youtube.com/watch?v=SprRX6mSsEg
For Class one Levers click here:
http://bvg8science.wikispaces.com/page/edit/Tamara%27s+Class+1+Levers?template=