When did the word lever enter the English language?
The word lever entered the English language around 1300. It sprang from the stem of a verb meaning to raise and traces back to an adjective levis which means light or not heavy.
Questions about Lever
Short answers, pulled from the story.
Who does Autumn Stanley argue invented the first lever technology?
Autumn Stanley argues that prehistoric women were the inventors of lever technology through the use of digging sticks. The next earliest known cultural evidence dates back to ancient Egypt where it was used in a simple balance scale.
What famous statement did Archimedes make about levers in the third century BC?
Archimedes famously stated that if given a long enough lever and a fulcrum he could move the world. This original Greek phrase has led to the adoption of the phrase an Archimedean lever for abstract concepts beyond mechanics.
How are Class I Class II and Class III levers classified by position?
Class I places the fulcrum between the effort and the resistance while Class II locates the resistance between the effort and the fulcrum. Class III puts the effort between the resistance and the fulcrum with examples including seesaws wheelbarrows and hoes respectively.
Which bones in the middle ear function as compound levers to transfer sound waves?
The malleus incus and stapes function as small bones in the middle ear that connect as compound levers to transfer sound waves. They move energy from the eardrum to the oval window of the cochlea.