Levers can be arranged in different ways and are described in three classes, all of which follow the law of the lever. Class 1 is perhaps the most familiar. Examples of that are a seesaw ...

The light switch on the wall, for example, and the stapler on your desk. You use levers when you shift gears on a bike and when you hit the brakes. A doorknob is a type of lever. And then there's ...

Fran: And what's your lever going to do? Nevaeh: It's going to make our fish jump into the ocean. Fran: Now, did you know that scissors are also an example of a lever? Fran: So, where you're ...

Key fact When a lever is balanced it has equilibrium - the load is balanced on either side. A crowbar is an example of a first order lever that puts the load closer to the fulcrum - this gives it ...