Levers!

1st Class, 2nd Class and 3rd Class Levers... How can we remember these!?

THINK

1 2 3

F L E

If the Fulcrum is in the middle then it is a 1st Class, if the Lever is in the middle then it is a 2nd Class and if the Effort is in the middle then it is a 3rd Class.

What about Mechanical Advantages and Disadvantages?

THINK

1 2 3

F L E

B A D

1st Class Levers can have Both (depends on where the Fulcrum is, if it closer to the Effort then it is a Disadvantage)

2nd Class Levers always operate at an Advantage

3rd Class Levers always operate at a Disadvantage.

This is just one of many ways I can make theory easy to understand and remember!