Newton's Laws Of Motion (2) : Force, Mass And Acceleration

ESA Science - Newton In Space (Part 2): Newton's Second Law of Motion - Force, Mass And Acceleration.

Newton's laws of motion are three physical laws that form the basis for classical mechanics. They have been expressed in several different ways over nearly three centuries.

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The laws describe the relationship between the forces acting on a body and the motion of that body. They were first compiled by Sir Isaac Newton in his work "Philosophiæ Naturalis Principia Mathematica", first published on July 5, 1687.

Newton used them to explain and investigate the motion of many physical objects and systems. For example, in the third volume of the text, Newton showed that these laws of motion, combined with his law of universal gravitation, explained Kepler's laws of planetary motion.

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Newton's Second Law of Motion: A body will accelerate with acceleration proportional to the force and inversely proportional to the mass.

Observed from an inertial reference frame, the net force on a particle is equal to the time rate of change of its linear momentum: F = d(mv)/dt. Since by definition the mass of a particle is constant, this law is often stated as, "Force equals mass times acceleration (F = ma): the net force on an object is equal to the mass of the object multiplied by its acceleration."

History of the second law

Newton's Latin wording for the second law is: "Lex II: Mutationem motus proportionalem esse vi motrici impressae, et fieri secundum lineam rectam qua vis illa imprimitur."

This was translated quite closely in Motte's 1729 translation as: "LAW II: The alteration of motion is ever proportional to the motive force impress'd; and is made in the direction of the right line in which that force is impress'd."

According to modern ideas of how Newton was using his terminology, this is understood, in modern terms, as an equivalent of: "The change of momentum of a body is proportional to the impulse impressed on the body, and happens along the straight line on which that impulse is impressed."

Motte's 1729 translation of Newton's Latin continued with Newton's commentary on the second law of motion, reading: "If a force generates a motion, a double force will generate double the motion, a triple force triple the motion, whether that force be impressed altogether and at once, or gradually and successively. And this motion (being always directed the same way with the generating force), if the body moved before, is added to or subtracted from the former motion, according as they directly conspire with or are directly contrary to each other; or obliquely joined, when they are oblique, so as to produce a new motion compounded from the determination of both."

The sense or senses in which Newton used his terminology, and how he understood the second law and intended it to be understood, have been extensively discussed by historians of science, along with the relations between Newton's formulation and modern formulations.

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[averyh]

here from that one girls science teachers playlist

[-xolyon-]

such a swag video, I learnt so much about star wars and jimmy neutron

[monishapatel]

either. nerds watch this or you have to watch this for school

[april]

I love when the intro takes up half of the video <3

[petergribben]

Very good but a mistake in confusing rolling friction (skateboard/roller skates) and sliding friction (ice skates).  In rolling friction, the drag to motion is in the bearings of the wheels and you want friction between the wheels and the surface to be a maximum.  In sliding friction you want the friction to be at a minimum between moving object and surface.

[rhoadess]

Gravity does act on the astronauts orbiting the earth, they float only because they are constantly falling.

[TheTopgurl]

heheh... too coolll
y didnt use these techniques to make it more clearer to us...
now i understand it much better than before...

[MIKEOXLONG-dmjm]

Fascinating, but I still can't grasp why something will carry on moving at a constant velocity for ever, it's mind boggling bcause we don't see it in everyday life, why doesn't it need extra energy to maintain its velocity for ever? How can one single push propel something at the same speed for the next hundred billion years & still keep going without losing any energy/pace? Like I said, fuckin fascinating. Peace out.

[GuerrasLaws]

Physics test: “Without” applying the Energy from within you, choose an object of your choice, and apply only the Force or Net Force needed to push it away from you or pull it towards you. Please let me know if you’re able to. This is only a test. Thank you.

[NixxonMontgomery]

I make physics interesting in my video. It's so interesting you forgot its physics.

[tmanj]

These are the kinds of things they teach you in fifth or sixth grade science. :P

[DaveTheMedic]

This is a really great vid, however the pool example at 2:30 isn't completely accurate.
It is a oversimplified example, because they are not counting the force from the water that is being held back by the group of people. Obviously, that force is almost insignificant in the example they showed, but if you were to do a similar exercise on a shallow waterslide for example, the group with more mass would EASILY overtake the single rider, because of the water that they are blocking and thus being pushed by.

[aqualungalbumbyjethrotull]

would these laws of motion also apply to our hearts when touched by movement from the Holy Spirit?

[ailyn]

thank you. SO much more clearer now. haha.

[radinelaj]

What about a golf ball in space?
If an astronaut throw a golf ball( or a dice)in space, did it stops floating? Or it will cruise forever/ perpetually?

If the dice stops, it means : the aether exist which causes the friction in space, or the

About Michelson Morley experiment :
Answer : the light is like the water is an exception for some experiments, thus that is unclear experiment.

[mrzorg]

Just actually LOVE the music, gathering these links, for dummies who don't understand even basic physics. Ya know, those who don't believe rockets work in space.

[ralphbledsoe]

I have been using this video for 8 years now. I appreciate Europe. not just America.

[gunterhaugins]

ds video is lethal.... has the lads from ash all over... retro check out morrissey and d apples, he js got a hair cut.... i like playing wit paper.... git got a gud mcdonalds... dean wasnt invited..

[duckright]

We watched this in our physics class, and wanted to point out a couple of things. The narrator kept saying that the less massive object would have great speed. That is not necessarily true. The speed that the object attains depends on its rate of acceleration which is dependent upon the force applied and the mass of the object. How fast it goes depends on how long the force is applied. Please revise the video and repost so I can share with my class. Great job otherwise.

[faimhurensohn]

Was müssen die 2000er Jahre nur für eine beschissene Zeit gewesen sein