Leonardo Da Vinci was the first systematic study of friction?

Until now, many art historians still use the word "inappropriate" to evaluate the hasty sketches of Leonardo da Vinci. However, in the study just published, Professor Ian Hutchings at Cambridge University demonstrated one of da Vinci's sketches in 1493 hidden extremely important information: the first record describing ghosts. close.

Although it has been assumed before that da Vinci was the first to systematically study friction, laying the foundation for the science of friction, drag, lubrication, . However, how and when exactly he did, there was no concrete evidence. To elucidate this question, Professor Hutchings sought out manuscripts that were supposedly "unrelated" because da Vinci wrote in 1493 with red chalk.

In fact, this sketch has started to draw attention since the early 20th century because its first part is the image of a woman drawn faintly, underneath the words "cosa bella mortal passa e non dura " , the mortal beauty passes and does not last", translates "any beauty that passes and does not exist forever" . However, by the 1920s a museum director made a statement. remove notes, sketches, and red chalk diagrams because they are "not relevant".

The sketch describes the friction of Leonardo Da Vinci.

Nearly a century later, Professor Hutchings thought that these sketch pages also had other values, hiding some additional information. And finally he discovered that the circular squares located below the red line were to describe a series of heavy blocks pulled by a dumbbell hanging on a pulley - and this is also one of the attempts. experience that people often use to teach students about friction."The sketches and notes show that Leonardo understood the principle of friction in 1493", Hutchings said .

Hutchings added: "You know that friction between two sliding surfaces is proportional to the force between the two surfaces and that friction is independent of the contact area between the two surfaces. This is the law of friction that we often use today and thinks that it was developed by French scientist Guillaume Amontons 200 years later. "

In this study, Hutchings demonstrated how da Vinci could apply his knowledge of friction to design complex machines within the next two decades. Da Vinci saw the effectiveness and efficiency of friction, and its impact on wheel designs, axle and pulley systems, .