How Lever works?

Levers are force multipliers so the effort, the imput force, can produce a larger force on the load. Levers use moments to work. M=Fxd

Here's an example:

You use a force of 5N to lift a load. The lever causes your hand to be 1m away from the pivot of the lever. The moment is 5Nm.

The load is 0.2m from the pivot. Rearrange the equation and you should find:

F=M/d --> F=5/0.2=25N

Hope this helped!