Engineer finds a Top Physics Finding in da Vinci's 'irrelevant Scribbles' - Physics-Astronomy.org

Engineer finds a Top Physics Finding in da Vinci's 'irrelevant Scribbles'

Until currently, art historians dismissed a number of doodles in da Vinci’s notebooks as “irrelevant.”
But a latest study from Ian Hutchings, a professor at the University of Cambridge, showed that one page of these scribble from 1493 actually contained amazing groundbreaking: The first written report demonstrating the laws of friction.
Although it has been ordinary knowledge that da Vinci conducted the first systematic learn of friction (which underpins the modern science of tribology, or the learn of friction, lubrication, and wear), we didn’t recognize how and when he came up with these ideas.
Hutchings was clever to put together a detailed chronology, pinpointing da Vinci’s "Aha!" instant to a single page of scribbles penned in red chalk in 1493.
According to Gizmodo, the page drew pull towards the beginning of the 20th century since of a faint etching of a woman close to the top, followed by the statement "cosa bella mortal passa e non dura", which translates to "mortal loveliness passes and does not last".
But a 1920s museum director dismissed the page as "irrelevant notes & diagrams in red chalk".
Approximately a century later, Hutchings thought this page was worth a second look. He exposed that the rough geometrical figures drawn underneath the red notes show rows of blocks life form pulled by a weight hanging in excess of a pulley – in exactly the same kind of trial students might do today to demonstrate the laws of friction.
"The sketches and text show Leonardo understood the basics of friction in 1493," said Hutchings in a University of Cambridge press release.
"He knew that the force of friction acting between two sliding surfaces is proportional to the load urgent the surfaces together and that friction is independent of the obvious area of contact between the 2 surfaces. These are the 'laws of friction' that we nowadays regularly praise to a French scientist, Guillaume Amontons, working two hundred years later."

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