Why were Newton's laws of motion discovered so late?

[thebosonbreaker]

Hi,
I had a thought recently which gave rise to a rather interesting query. A helicopter works and is able to fly due to Newton's third law of motion. The propellers rotate at a high speed and exert a force on the air beneath them. By N3L, the air therefore exerts an upwards force on the propellers, thus causing the helicopter to lift off the ground and begin to fly.
An understanding of Newton's laws is integral to the design and operation of the modern-day helicopter. The first modern-day helicopters came about in the 1940s so the laws were well known by then...but here's the thing.
Newton published his laws in the Principia in 1687, but Leonardo Da Vinci had already invented the 'Aerial Screw' which was one of the earlier helicopter-like machines. But according to the internet, Da Vinci first published his detailed plans of the aerial screw in 1485, a staggering 202 years before Newton published his laws and of course well before Newton himself was born.
Clearly Da Vinci had to have an understanding of at least something akin to the basic laws governing motion, so why did they only become a breakthrough in 1687 and not many years before? With Da Vinci possessing perhaps one of the greatest minds in history, one would believe that he would have explored this in greater detail. You can't build (what was considered in that era...) such advanced and pioneering inventions as that of the aerial screw without understanding these underlying principles.
Does anybody have any thoughts on this, or am I missing out any crucial details? I'd be interested to hear!
Thanks in advance.

 

[A.T.]

A helicopter works and is able to fly due to Newton's third law of motion.

So do rockets, and sails and tons of other stuff, that was build and used, not just drawn, long before Da Vinci.

Clearly Da Vinci had to have an understanding of at least something akin to the basic laws governing motion

Many people had empirically acquired qualitative intuition of them for specific cases. The big leap is to generalize them to everything and to make them quantitative.

 

[russ_watters]

An understanding of Newton's laws is integral to the design and operation of the modern-day helicopter. The first modern-day helicopters came about in the 1940s so the laws were well known by then...but here's the thing.
Newton published his laws in the Principia in 1687, but Leonardo Da Vinci had already invented the 'Aerial Screw' which was one of the earlier helicopter-like machines. But according to the internet, Da Vinci first published his detailed plans of the aerial screw in 1485, a staggering 202 years before Newton published his laws and of course well before Newton himself was born.
Clearly Da Vinci had to have an understanding of at least something akin to the basic laws governing motion, so why did they only become a breakthrough in 1687 and not many years before? With Da Vinci possessing perhaps one of the greatest minds in history, one would believe that he would have explored this in greater detail. You can't build (what was considered in that era...) such advanced and pioneering inventions as that of the aerial screw without understanding these underlying principles.
Does anybody have any thoughts on this, or am I missing out any crucial details?

You imply one crucial detail you may be missing: da Vinci didn't build his aerial screw.

Da Vinci's drawings are akin to (but in general superior to, which is impressive enough) the "artist's impressions" you see in the media for such things that haven't actually been invented yet. It is unlikely his aerial screw would have worked.

The Wright Bros demonstrated how important it was to take a scientific approach to the problem of flight(experimental anyway) and succeeded because of it, whereas most of their competitors were just taking shots in the dark.

 

[Khashishi]

Had Da Vinci known about Newton's laws, he would have put two counterrotating screws on the airship. A single screw would never work.

 

[sophiecentaur]

The answer to the title question is FRICTION.
Things slow down naturally. The heavenly bodies had to be driven round their paths by some agency. Why would anyone think differently until there was some serious effort at proper experiments and friction could be identified as a force and not a natural tendency. Newton just happened to be smart and around at the right time for a paradigm change.

 

[r8chard]

In my opinion, I think a big reason was Newton was the right thinker at the right time of intellectual ferment sweeping Europe. He had the luxury of education and placement, that permitted him the tools and time to make discoveries. Inn addition, among his peers was a strong bond of wonder and communication is a society that encouraged them to compete for status and glory. And his achievements were famous among his peers across Britain, Scotland and Europe.
However, iy was Émilie du Châtelet whose own brilliance translated Newton’s work from mediocre Latin into French. Which language was cosmopolitan. Used by the rising Bourgeoisie, government bureaucrats as well as the Aristocrats, for diplomacy and philosophical disputes. This was a rime when philosophy included all the sciences. This Lady of Genius would popularized and rendered Newton’s Genius understandable to many more people.
/wiki/Philosophiæ_Naturalis_Principia_Mathematica#Annotated_and_other_editions
“... Émilie du Châtelet also made a translation of Newton's Principia into French. Unlike LeSeur and Jacquier's edition, hers was a complete translation of Newton's three books and their prefaces. She also included a Commentary section where she fused the three books into a much clearer and easier to understand summary. She included an analytical section where she applied the new mathematics of calculus to Newton's most controversial theories. Previously, geometry was the standard mathematics used to analyse theories. Du Châtelet's translation is the only complete one to have been done in French and hers remains the standard French translation to this day.[103] ...”

 

[Stephen Tashi]

The propellers rotate at a high speed and exert a force on the air beneath them.

That's not a good description of how helicopter blades generate lift.

 

[r8chard]

I am listening to KUSC radio and they announced that Isaac Newton was born this day, January 4, 1643.

So, here is a big shout out "HAPPY BIRTHDAY, SIR ISAAC!"

 

[Vanadium 50]

Actually, he was born on December 25, 1642.

 

[jbriggs444]

Actually, he was born on December 25, 1642.

Wikipedia explains:

"During Newton's lifetime, two calendars were in use in Europe: the Julian ("Old Style") calendar in protestant and Orthodox regions, including Britain; and the Gregorian ("New Style") calendar in Roman Catholic Europe. At Newton's birth, Gregorian dates were ten days ahead of Julian dates: thus his birth is recorded as taking place on 25 December 1642 Old Style, but can be converted to a New Style (modern) date of 4 January 1643."

[The physics of his birth are invariant, but the coordinates assigned to the event are not]

 

[r8chard]

ibriggs444, Newton was such a genius, he managed to be born on both dates. In order to collect double the presents!

I believe his mother grumbled some choice, pithy Anglo-Saxon terminology at having to endure such an obstreperous brat.

 

[sophiecentaur]

ibriggs444, Newton was such a genius, he managed to be born on both dates. In order to collect double the presents!

I believe his mother grumbled some choice, pithy Anglo-Saxon terminology at having to endure such an obstreperous brat.

He was 'not a nice person', by all reports but was around at a time of change in knowledge and thinking. He bullied Hooke, who I expect he recognised as equally smart. If Newton had become ill and died, someone like Hooke would probably have carried the baton and we could have had Hooke's 1,2 and 3 Laws of motion.
I feel the same about Einstein. He was first over the line but there were a number of others who could have got there after a bit of a delay. It has to be true that, without Einstein's existence, we would not be using Newtonian Science today - on PF .
This is not to belittle any of their achievements but the modern personality cult needs to be treated with reservations.

 

[r8chard]

sophiecentaur, I concede that you have some good points there. My view is that Newton and Einstein were at the hub of a multitude of contributors. Their genius was to to collect, correlate and clarify the scientific research of their time.

Unfortunately, the Public is uninterested in complicated. They want short pithy baitclick headlines with A hero and A villain.

However, if you check the textbooks commonly used for the sciences, there is no shortage of credit given to the contemporaries of Newton and Einstein. The forums on this site are lavish in using the names of other scientists as shorthand for mathematical formulas and physics theories and astronomy.

 

[sophiecentaur]

sophiecentaur, I concede that you have some good points there. My view is that Newton and Einstein were at the hub of a multitude of contributors. Their genius was to to collect, correlate and clarify the scientific research of their time.

Unfortunately, the Public is uninterested in complicated. They want short pithy baitclick headlines with A hero and A villain.

However, if you check the textbooks commonly used for the sciences, there is no shortage of credit given to the contemporaries of Newton and Einstein. The forums on this site are lavish in using the names of other scientists as shorthand for mathematical formulas and physics theories and astronomy.

I don't know too much of the history of Newton's appreciation by his scientific peers but I think it's well known that he was not a very nice person and was interested in his personal status. Strange that someone with such an analytical mind should turn to Magic and illogic in his later years. But history has chosen his name as an icon for the progress made during his era. Likewise for Einstein - but, apart from the natural bickering, I think he was less 'unpleasant' with his peers (just with his wife, I read). Again, his name is shorthand (with the public) for all that went on a hundred or so years ago.

 

[Prophet]

He was 'not a nice person', ...

Some speculate that he was autistic.

 

[sophiecentaur]

That figures. For some reason, he suddenly took up Alchemy. That was nutty.

 

[Prophet]

That figures. For some reason, he suddenly took up Alchemy. That was nutty.

He also developed a great interest in religion. He calculated that Jesus Christ would return in 2060.

 

[sophiecentaur]

I doubt that I will be able to check that out but some PF members should be in with a chance.

 

[FactChecker]

The big leap is to generalize them to everything and to make them quantitative.

This is worth emphasizing. Newton's ideas were, in many ways, very counter intuitive. Before Newton, anyone would swear that there were different rules for objects in space, like the moon, which floated in the sky, versus objects on the ground which fall to Earth. So they would think that there were no universal laws. Newton could see through to the truth, establish it in enough rigor to convince himself and others, explain other consequences like the gravitational pull of the Moon creating tides, and get the math so well understood that accurate calculations and predictions could be made. That was true genius. And that is why no one did it earlier.

 

[Herman Trivilino]

Newton's Three Laws in and of themselves pale in comparison to the conclusions drawn from them.

The laws formed the basis of a framework of knowledge that continues to this day to be used to draw important conclusions. About 25 years ago I attended a series of lectures given by an atomic physicist making preparations to build an "atom trap". He told us and showed us how to do most of the math using only Newtonian physics, there wasn't an $h$ or a $c$ anywhere in a lot of these calculations.

 

[lekh2003]

He also developed a great interest in religion. He calculated that Jesus Christ would return in 2060.

This is unusually true. I did some reading and found this handy link: https://isaac-Newton.org/statement-on-the-date-2060/

It is hard to believe that such a genius would not use logic to find the flaws in his thoughts about religious prophecy. But then again, uncertainty was not yet introduced at the time, so he must have believed that anything and everything can be predicted.

 

[davenn]

He also developed a great interest in religion. He calculated that Jesus Christ would return in 2060.

This is unusually true. I did some reading and found this handy link: https://isaac-Newton.org/statement-on-the-date-2060/

It is hard to believe that such a genius would not use logic to find the flaws in his thoughts about religious prophecy. But then again, uncertainty was not yet introduced at the time, so he must have believed that anything and everything can be predicted.

Guys ... please keep religious discussion off PF as per the forum rulesDave

 

[willem2]

Another way to use the third law is rowing. More than 3000 years before Newton:
http://www.bbc.co.uk/ahistoryoftheworld/objects/-q-160iURT694-i0Eo5b8Q

 

[lekh2003]

Guys ... please keep religious discussion off PF as per the forum rulesDave

Sure Dave, I just thought it might be useful. I'll refrain from discussing religion further in the thread.

 

[epenguin]

ibriggs444, Newton was such a genius, he managed to be born on both dates. In order to collect double the presents!
.

Nit picking, when he was born England had started the Civil War and Puritan dominance, and his was the most Puritan part of the country. Celebration of Christmas Day was discouraged and it was banned as holiday, there were probably no presents.

He was 'not a nice person', by all reports

He was not a very nice person

I remember but cannot at the moment find, a description of his personality by a contemporary, must have been Pepys, Halley, or someone like that, who described him as “a very nice man”.

Mind you, at the time “nice” meant something, like fastidious, precise, fussy, finicky, and he was defensive, quick to take offence, quarrelsome and vengeful.

 

[sophiecentaur]

Mind you, at the time “nice” meant something, like fastidious, precise, fussy, finicky, and he was defensive, quick to take offence, quarrelsome and vengeful.

Dat's may boy!
. . . .and "quite nice" was even further in that direction. That's language for you. I wonder why that shift in meaning occurred.

 

[epenguin]

Dat's may boy!
. . . .and "quite nice" was even further in that direction. That's language for you. I wonder why that shift in meaning occurred.

That’s part of a more general question for which there is a section of the forum for discussion: Art, Music,History and Linguistics under General Discussion. I happen just now to have seen an article on the subject of word change, which is the most frequent mode coining of new words, rather than total invention ex novo. It turned out to be a fairly special aspect of it, but curious. http://www.economist.com/news/books...nt-cultures-where-do-new-words-come?frsc=dg|e

 

[Keith Mackie]

The delay in Newtons work has to do with a prior failure to recognise something obvious - acceleration. The Aristotilean approach only got as far as recognising "violent" motion - in effect impact or jerk and it stayed that way until Galileo. The origin of the rational approach goes back to the atomic theory of the Epicurians. Lucretius, in about 60 BC, arguing from atomic theory showed that all bodies must fall at the same rate. Since it was known that this was not alway true, he also deduced air or water resistance. 1600 years later the advent of gunpowder created artiliary and the need for a theory of ballistics. Galileo was familiar with Lucretius' work and set about an experimental test by slowing down gravity. He did this by rolling objects down an inclined plane - presumably a large table and marking off the travel in equal intervals of time. That way he formed a clear idea of the nonlinear nature of acceleration and the rest is history!

 

[r8chard]

As for criticism of Newton or for that matter Einstein and everybody past and present? I think you would be better served putting Sir Isaac's life in the social context of his time.

We are all Human and we all try to persevere through our human failings. With Newton, he lived in a Britain undergoing a major cultural and political sea-change . Just a generation or two after violent upheavals that would have resonating effects through British Society for centuries.

The term 'Flashing Blades' was NOT a poetic metaphor, The blades were sharp and deadly. Many people today would consider Newton's upbringing and the relationships through his life to be rather distasteful. However, we cannot alter the past. We can try to learn from it and try to be better people ourselves.

 

[person_random_normal]

You can't build (what was considered in that era...) such advanced and pioneering inventions as that of the aerial screw without understanding these underlying principles.

Probably Da Vinci didn't put it as explicitly as Newton did !
It seems technology spurred unveiling of underlying science. Nowadays, it happens other way , i believe !