Define the THREE CLASS OF Lever and give ONE example in each class
There are three types or classes of levers, according to where the load and effort are located with respect to the fulcrum.
Since humans usually provide energy to levers, the words “effort” and “load” are often used instead of input and output.
A fulcrum is an object about which the lever pivots. There are three classes levers, according to the position of the fulcrum.
Class 1 has the fulcrum placed between the effort and load. Class 2 has the load between the effort and the fulcrum. Class 3 has the effort between the load and the fulcrum.
Each has its own uses and advantages.