10 Facts about Levers

A lever is a simple machine, that is the basis of many tools in and around your house and work.
The way levers work is by a force is applied at a point, which moves a load at another point through a balance point called the fulcrum.

It is the relative positions of these three points - the force, the load, and the fulcrum - that distinguishes the type or class of lever. There are three classes of lever 1st, 2nd, and 3rd class.

1. Archimedes had this insight about a lever, "Give me a lever long enough and a fulcrum on which to place it, and I shall move the world."

2. A wheelbarrow is a class 2 levers that allow you to carry heavy loads.

3. Scissors are actually a wedge combined with a 1st class lever.

4. Pliers allow you to multiply your gripping power by using a 1st class lever.

5. A see-saw is a regular fixture at playgrounds and uses the power of a 1st class lever.

6. Hockey players use the leverage of a third-class lever in order to shoot the puck at great speeds.

7. A golf club is a 3rd class lever.

8. A 1st class lever has the fulcrum in in the middle and the force is on one side and the load is on the opposite end. 

9. A 2nd class lever has the load between the force and the fulcrum. 

10. A 3rd class lever has the fulcrum on one end, the force in the middle, and the load on the end.

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