Eg of class 1
Seesaw
Eg of class 2
Wheel burrow
Eg of class 3
Shovel
Position of fulcrum in class 1
In the middle
Position of fulcrum in class 2
On the left
Position of fulcrum in class 3
On the left
Position of load and effort in class 1
Load on the left pointing downwards, effort on the right pointing downwards
Position of load and effort in class 2
Load in the middle pointing downwards, effort on the right pointing upwards
Position of load and effort in class 3
Load on the right pointing downwards, effort in the middle pointing upwards