Thank you Mr. Anderson! After going through AP Chem last year with your youtube lessons and learning so much from them, I am going through AP Physics I with these videos. Thank you again for making these videos- your careful and clear explanations really help!

how come u didnt mutiple 15 x 12 rad /s but instead u did 12//// was that a mistake?

Thank you so much for this. Back in college for a MS after 6+ years and Physical chem is kicking my butt. This helped a ton!!

This video and the way your videos are produced is extremely helpful.

Thank you! Gonna have a lab assignment in a couple of hours and this video cleared my confusion right up! excellent :)

See, my ACTUAL PHYSICS TEACHER couldn't explain this to me in a way I could understand. SO I completely bombed the final. That being said, I can go make up the final and if I do better it'll replace my old one. You, my good sir, are WAY better at explaining this than my actual teacher. Hats off to you, my friend! :D

thank you Mr Anderson... you are my first teacher since I decided to walk in premed and now that I'm about to reach my goal you are again helping me....

So clear! Such a neat video! I love it! Subscribed at once! Thank you!

In 2019 and from Middle East, I am watching your video and I want to thank you 🙏

@bball_ontop

3 жыл бұрын

marhabaan

This is an excellent video Sir. Thank you.

Very helpfull! 1st bach physics student this isn't the first time i saw one of your vids, this one was so helpfull i subbed ;)

wow, really helpful video. Thank you!!

Good video Bozeman, I would recommend that when it comes to the units different quantities, explaining the significance could add more value to your videos and also to the student using this as a resource. Thanks!

@bball_ontop

3 жыл бұрын

his name is Mr. Andersen

thank you for simple and clear explanations

Great Video. What program are you using to film and present these videos?

Very precise explanation!

great video, exactly what I searched for!

THIS WAS SO AWESOME!

Very good educational video ! thanks !

his kids are lucky - they're gonna be so smart. Imagine your dad was teaching you all these things when you were little. Very cool!

Amazing video. Thanks!

Sir thank u very much for this vdo but pls if u can make a video on laws of conservation of angular momentum pls.....

Thanks, really helpful video!

You are my Saviour, sir 💜

Thanks a lot ^^ Really helpful

online education seems more effective than going to school and colleges

@Coolalexxela1

7 жыл бұрын

obviously not, *effective

@IDoNotFeelCreative

7 жыл бұрын

And now we know how to apply the word _effective_ in a sentence. Hooray. Ironically, the comment meant to contradict anonymous's opinion gave another argument as to why it is correct. Ah... the youtube comment section...

@rainbanreborn1533

7 жыл бұрын

>implying this video is about grammar

@Ali-ee6wp

6 жыл бұрын

anonymous clark haha....noope!

@LABoh122

6 жыл бұрын

you mastermind jesus, do you live by the play hamilton? Ah yes

I learned more watching this video in 7 mins than I did in two weeks in my AP Physics 1 class

Your the man. Yes you are. thanks

@bball_ontop

3 жыл бұрын

He's the man.

@Bozeman Science how to understand that instantaneous angular displacement is Vector while finite angular displacement is scalar ? Can we have video regarding this topic ?

really! helpful.... thank you!!!!!

Nice vid. But when did 11 start to equal 12?? (@ 4m10s)

Really did help !!

It's a great video about angular momentam..

i have an doubt that when angular momentum is very large the the designed object what will be the result / effect of the object?

thank you sir!

I have a question about the mitochondrial membrane, what happen if the mitochondrial membrane becomes hyperpermeable to proton, will that be a bad thing ?

I fucking love the internet.

WELL EXPLAINED

Thank you. Just solved how I can create levitation awesome explanation

Is it possible to tap off of centrifugal force in only one tangent to provide a lateral thrust or pull? An example would be a spinning disc that has a weight attached that remains retracted toward the axle except at one point. I believe the counteractive force of retraction would not cause a cancellation because it would not occur at the opposing side due to the rotation. Could this not be used in space even though it seemingly contradicts the act of motion requiring "something to be left behind" such as exhaust?

@FiguringOutWhatIsLife

6 жыл бұрын

no

u are best in this world.......so where from you have came

Sorry for my ignorance, but why it isn't possible to make some sort of system that uses this forces to take off a little model without proppelling fluids?

Thakn you so much sir from India

he looks like he could be a Green brother

@AliRaza-zk8vo

7 жыл бұрын

S. You mean hank green's brother???

Yarr u r fab fantastic, grt there is no need to go to college. U r doing great job

Amazing!

What is the vertical analogue of angular momentum

Thank you sir

Very helpful

I have a question, please What if we have a wheel rotating at a constant speed and its period of rotation is known Can we calculate the mass of another wheel that must be placed vertically on it in order for it to stop? What are the other critical data?Thank you, I hope get the answer

Why angular momentum has a direction at right angle to direction of linear momentum ? What is the significance of direction of angular momentum ?

@pepedecoatza

9 жыл бұрын

Im not an expert but the direction can mean tension or compression on a rotating shaft for example. look at the guy rotating on the chair, on a clockwise rotaion the forces are oposite ( this is a tensile force) on the other case it would be compression on the rotating shaft. i hope it helps

@cyrilgamage6692

9 жыл бұрын

The subject area of ‘Angular Momentum’ seemed to me, filled with lots of miss understandings and miss interpretations. The Rotary Motion as a whole in the world, starting from the child’s Top, bicycle and to end up with solar systems and galaxies, have not been explained acceptably enough. Many different demonstrations are there to be observed but the phenomenon is not explained well. However teachers got used to defend themselves by referring of the matter to the gloomy theorem of “Conservation of Angular Momentum” which cannot be understood by human beings. I am not afraid to challenge this theory of ‘Conservation of Angular Momentum’ because it doesn’t have any provable mathematical, practical or logical basis behind. From my childhood I was against of the ‘direction of angular momentum’. Why hand rules if the mechanism behind the phenomenon is clear to the founder? Just for an argument’s sake, you can imagine a child who is rotating a mass tied by a thread around his finger. It is clear that the rotating object possesses a certain angular momentum. At once the thread is broken and the mass is thrown away in a straight line. Then what is the ‘Conservation of Angular Momentum’ there? But ‘Energy’ is conserved there, after and before the incident as well. Therefore Albert Einstein’s ‘Conservation of Energy’ is adequate to explain every energy based dynamics in the universe and other kinds of conservations are not logically acceptable. The fault is with the society for accepting the entire package produced by the great scientist Sir Isaac Newton without testing or challenging over centuries. There is no argument that Newton is the greatest among all the practical scientists ever lived upon Earth. But a certain part of a theory could be erroneous and it is the fault of other scientists who lived ever since without testing the contents to identify erroneous sections. Therefore the scientists of the 21st century have the soul responsibility to challenge and test the Himalayan stock of unfiltered knowledge base ever accumulated through centuries in the field of Physical Science or unless our prospective kids will certainly go mad by mental pollution. Theories must be frequently challenged or unless ‘Physics’ too would become a conservative subject such as ‘History’ or ‘Archeology’. Paradoxes are always manmade and products by wrong theorizations. ‘Reality’ itself is simple enough to understand by a man, or unless it cannot be the ‘Reality’ The theory of ‘Action & Perpendicular Reaction’ can explain all the complicated cases related to rotary systems. (The theory is first published as ‘The Alternative Dimension in Angular Momentum’ /Space Dynamics-V4/2012 and this can be considered as the second edition of the previous publication.)

Thanks!

My physics book says that the point object doesn't have to rotate around the origin but pass through a position vector from the origin with linear momentum. It is that position vector that rotates around the origin and not necessarily the object. It is just like if you take your hand and push the record in a straight line, your hand will continue to move perpendicular to the record but the record itself will rotate. At least that is what my book says.

@At-Tucsoni

Жыл бұрын

NERD

Thank you

at 4:10, shouldn't your calculation show l = (15kg*m^2)(12 rad/s), and not 11 rad/s?

@tyrtar

6 жыл бұрын

nah sig figs

@LABoh122

6 жыл бұрын

yeah the calculations to get the velocity isnt shown so we can rely that sig figs round to 11

@bball_ontop

3 жыл бұрын

true he must have made a mistake but his explanations were so clear

so helpful

Sir very helpful.

I learned more in one short video than I did in 3 hours of lecture

@basavarajbasu9262

6 жыл бұрын

backdraftvideos photos

Why are you putting omega= 11rad/s As given is 12rad/s At4:20

Very well ☺️

It took me forever to understand angular momentum; I was pretty much thinking of it as "something spins there, and something else spins there".

1:10 r isnt written as a vector but it should be cuz u taking the vector product

This was nice, but somehow still don't seem to get the right answer, m=5.8kg r=0.1 m L=0.25 kgm^2/s but somehow w=100rpm how?

awesome

Is there a difference between angular momentum and magnetic moment?

@carultch

Жыл бұрын

Yes. Angular momentum doesn't necessarily have anything to do with magnetism. It is a measure of the distribution of linear momentum, based on how far it is from a reference point, that has analogous properties with linear momentum. Moment in general means quantity multiplied by distance from a reference point, which will apply for magnetic and electric dipole moments. There is a connection between angular momentum and magnetic dipole moments at the quantum level, where the property of electrons known as spin, is what gives ferromagnetic materials their magnetic behavior. It is very complicated how quantum spin relates to any actual spin, so most instructors try to tell you "it is just a name" and dismiss your follow up question to understand why it has that name or what exactly is spin (the question every student has at one point). This is a common thing that happens with terms in quantum mechanics, because we assign names to quantum concepts, with very complicated connections to how it relates to that name in normal terms. Another example being color charge, that has nothing to do with the visible color of matter.

When u started saying torque or inertia I sudnly detached from video

How force or energy are correlation with sinusoidal weaves So we found what time it required and rewrite it's parameters according to Time and we found an advanced situation where we show natural calamities 🕉🕉🕉

Why is angular momentum defined as it is? Is it just a quantity that its empirically observed to be conserved

@starmessenger8468

7 жыл бұрын

Angular momentum is "Geek Talk" for circular rotation.

Imdont get torque. Why is it up or down when it's moving horizontally?

Angular momentum has a much higher impact on motorcycles than bicycles. Bicycles' angular momentum of their light wheel/tires is almost insignificant vs the weight distribution/and steering of it's pilot. Well, the angular momentum is mostly in the pilot anyways.

Nice guy

it was helpful but i am in search of the derivation of of the equation used to derive angular momentum of point object that revolves around another point i need the derivation for the equation L=r*F can you please make video on this sir.

@carultch

Жыл бұрын

You're thinking of tau = r cross F, which is how we define torque. L= sum(r cross p) is angular momentum's definition from linear momentum.

Isn’t the angular momentum for a disk L=1/2Iw ?

@carultch

Жыл бұрын

Assuming it is uniform, solid, and cylindrical, yes.

Fun one: (Yes, I know there's friction involved that'll stop it eventually) The last diagram with the turntable, wheel, string & weight... *As the weight drops the string unravels from the wheel forcing the turntable to rotate faster... Until the end of the string is reached, then the continued rotation starts to haul the weight back up, slowing the turntable until it stops, then the weight starts to drop... [go back to *] If this was totally frictionless this cycle would continue to display the relationships between potential energy and kinetic energy until it was stopped by an external force.

@rafsanbinhossain9261

Жыл бұрын

i'm so confuse on the formula of point object. so what's the purpose of the first formula L=r x p and the second one L= r x m v?

@EarlJohn61

Жыл бұрын

@@rafsanbinhossain9261 the video tells you this. They are how you calculate the angular momentum of either a rotating item (like a ball on the end of a string) or a revolving object (like a pushbike wheel)

@rafsanbinhossain9261

Жыл бұрын

@@EarlJohn61 dm

@At-Tucsoni

Жыл бұрын

NERD

i'm so confuse on the formula of point object. so what's the purpose of the first formula L=r x p and the second one L= r x m v?

@adrianolsen7841

5 жыл бұрын

p is linear momentum. It is equal to m*v. So instead of writing p in the second formula he writes it out to m*v.

I was trying to learn about a broken planet at the bottom of it’s gravity well. The bottom of the funnel

if i is the moment inertia and e is kinetic energy , its angular momentum is

4:05 isn't that supposed to be L = (15kg m^2)(12 rad/s)? Why is it 11rad/s?

@3.ismail260

3 жыл бұрын

He takes average.

Where did the radians go at 4:08 in SI Units

@jyavant

7 жыл бұрын

Mahira Gulzar Radians are not "real" units. We use them as a reminder that we are using radians to begin with.

😢thanku❤

2:30 what is making angular momentum to transfer from wheel to chair?

@lonewulfx3

6 жыл бұрын

the law of conservation of momentum. by changing the direction of the wheel, you change the angular momentum, because of the law of conservation there is another momentum created by the chair to keep the total momentum the same

@carultch

Жыл бұрын

The torque that the person is applying to the handles of the wheel's axis.

plz ans. me about this

I believe there is no suck thing as gravity, the forces we see are caused be vacuum and angular momentum. We assume that black matter does not have anything to do with mass in space, earth is unique do to our atmosphere which causes a vacuum effect, objects weigh more holding mass toward the center of the earth, which is in angular motion.

Where did the radians go when u multiply rad/s*kgm^2???? How does that come out to kgm^2/s?????!!!!

@carultch

Жыл бұрын

Radians are a dimensionless quantity, so we "get to" do that. Radians refer to a ratio of arc length to radius, both of which have units of meters. Since everyone brought meters to the party, we cancel the units. We commonly specify radians when it is an angle or angular kinematics quantity, just to remind us what the term is.

I was never good in math and physics. But I understand everything in this video EXCEPT for the Right Hand or Left Hand Rule. How does an object move in the UPWARD direction or DOWNWARD direction when the rotational direction is changed? In other words who decides what is "UP" and what is "DOWN"? In Space, there is no "up" or "down" in relation to the rotation of the planets around the Sun. Just as there is no "clockwise" or "counter-clockwise" direction when viewing the rotation of the planets around the Sun. It's just your point of view. There is no CW and CCW direction. When measuring the flow (direction) of electricity thru a wire the left-hand and the right-hand rule can be applied. But there still is no up or down even if you were to position the wire in the verticle position.

@menamemacho

6 жыл бұрын

Star Messenger dude. u serious? research before u talk shit. I learnt this Right and Left HR in the 10th grade

Will gyrations increased the mass Or decrease the mass How it works 🕉🕉🕉🕉

Angular momentum does not play a significant role in not falling with a bycicle. If u go very slow u won't fall either, because you can make little corrections.

Hello, congratulations for the explanation, but my head is not capable of doing these calculations! Could you help me or refer me to someone who can! Next, I'm making a stabilizing gimbal to stabilize a miniature boat that I have here at home, but I need to calculate how many kg this wheel needs to have, what speed it needs to turn and what angular speed I need! Could I explain? I'm trying gpt to help me with the calculations but I'm not trusting it! Today I have a PC driver disc wheel with 37 grams and a diameter of 100cm, it is rotating at 9 thousand RPM and my servo motor has a speed of 23sec/60°, how would I know what the resulting lateral force is? Thank you very much in advance!

I don't understand why the man in the chair rotates only when he rotates the wheel. Isn't all of the angular momentum already going to the right? Shouldn't there be less angular momentum to the right when he turns the wheel?

@dhirajverma712

5 жыл бұрын

As there is no external torque, angular momentum is conserve and by rotating the wheel axis he is introducing new angular momentum into the system which makes wheel rotating itself in other direction producing angular momentum of same magnitude thus total angular momentum remain conserve. It's what I think.

1:41 u cant take vector product of moment of intertia cuz its not a vector

at 4:10 you wrote 11 rads instead of 12 rads... was that a mistake?

I got a serious doubt...If L=I.ω the correct unit of angular momentum should be kg.sq.m*rad/s....Why is it just kg.sq.m/s...? Why is the radian ignored...? pls answer...

@carultch

Жыл бұрын

The radian is a dimensionless unit. It is a ratio of arc length to radius.

u cant say a planet orbiting a sun is rotational motion, but circular motion ... as i know from a 12th grader , rotational motion is when an object rotates around its fixed axis for example the rotation of the planet around itself.. the axis its rotating shud be a part of that body or object !!!pls , correct me if i am wrong

@themarieoakes

6 жыл бұрын

btw the earth turns/rotates on its axis AND orbits other bodies of gravitational masses

Shouldn't it be possible to use this fe. to change course of a rocket even though it has only one nozzle for thrust that can't be directed. Just use couple of gyros or whatever they're called to turn the whole ship to desired direction and then fire the rockets. Those gyros or flywheels could also stabilize the flight and reserve power.

@justkidding57

9 жыл бұрын

it is totally plausible to turn a satellite/spaceship using wheels/ gyroscopes but i think thrusters (newtons third law at work) are better. you probably still need some energy to turn the wheel. and most spaceships have more than one mini thruster around its body to do the turning

GOAT

Cool

私の実験では、回転体が傾くと表向きと裏向きの遠心力で９０度向きが変わります。

Could anyone explain to me why the angular momentum is perpendicular to the rotation?

@K7.8980

Жыл бұрын

Due to its association with tangential velocity

@littlerabbit7857

Жыл бұрын

Maybe L=τ x r=τ*r*sinθ(cross multiply). So, the L should be perpendicular to the rotation. I think it is not important, it is just for people to calculate the vector L easily.

I’m in high school and just curious, and I’m glad I was.

Why does the Sun have 99.9 of the mass but only 2 % of the angular momentum? It sounds bizarre to me can u explain that professor?

@carultch

Жыл бұрын

Because the planets are a lot farther from the center of mass of the solar system, than the material that comprises the sun. Jupiter has the vast majority of the angular momentum of the solar system, in the reference frame of the solar system center of mass. There is a reference plane of the solar system called the invariable plane, which is useful for keeping track of orbital inclinations and tilts, because it will never change orientation due to any action from within the solar system. It is approximately at Jupiter's orbit, due to Jupiter dominating the angular momentum of the solar system.