Levers are simple machines that we use in everyday life.
Levers include three main objects, an effort,a load, and a fulcrum.
The fulcrum is the object in which the force pivots.
Examples of 1st Class Levers
Levers also cpme in three classes, first,second, and third class,
An easy way to remember the different classes is to use FLE then 123.
- The F stands for Fulcrum.
- The L stands for Load
- The E stands for effort.
The 1,2, and 3 stand for the different classes.
You then look for what is in the middle.
If the fulcrum is in the middle it is a 1st class lever.
See Saw
Scissors
Pliers
Oars on a Boat
If the load is in the middle then you have a 2nd class lever.
Examples of 2nd Class Levers
Wheelbarrow
Nut cracker
If you have the effort in the middle then you have a third class lever.
Examples of 3rd Class Lever
Hockey stick
Broom
Stapler
So just remember FLE and then 123 to remember the classes of levers.
You may enjoy ....
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