Who invented the first class lever?

Answer 1

== == There are 3 class levers, 1st, 2nd and 3rd. A 1st class lever is a lever with its Fulcrum in between the Effort and the Load. An example is the scissors and a roller coasters and glow sticks.....!!!!! (JUST REMEMBER FLE 123 1= fulcrum in the middle 2=Load in the middle 3=Effort)
A Class-I lever is a lever set up like a see-saw ... with the effort and

the load located at opposite ends, and the pivot between them.

Class-II and Class-III levers both have the pivot at one end.

Class-II . . . the effort is at the other end, and the load is in the middle.

Class-III . . . the load is at the other end, and the effort is in the middle.
A see saws is the easiest description of a 1st class lever. The fulcrum is in the middle and the force is applied on one side. Scissors and pliers are other 1st class levers.
Examples of first class levers are

-see saw

-trebuchet

-scissors

-spud bar

-chop sticks
a form of lever in which the input and output forces are on either side of the fulcrum
scissors ,beam balance , seesaw,oars

Answer 2

Archimedes is CREDITED with inventing them, but like most simple machines, these have been used the beginning of humankind, so the real inventor is unknown.

Answer 3

teeter toter