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!
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
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...
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....
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!
@Bozeman Science how to understand that instantaneous angular displacement is Vector while finite angular displacement is scalar ? Can we have video regarding this topic ?
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.
True, an object can rotate about a completely different point than the point you use as an origin for angular momentum. This would ultimately mean that the object is both in rotation and translation combined, and you'd have to consider both phenomena simultaneously. An object in pure translation does have angular momentum, as counterintuitive as it may be. The reason is that when it collides with an object that can rotate, it will cause rotation. It usually is more convenient to consider angular momentum to be referenced to the axis of rotation.
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 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)
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
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.)
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
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.
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.
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
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?
Yes. We assign the direction to be along the axis of rotation according to the right hand rule, as a matter of convention. This is more of a matter of bookkeeping than reality, because nothing physical is happening in that direction. We opt to use the axis as the vector's direction, in order to reduce the number of arbitrary choices from a continuous plane of 360 degrees of arbitrary directions, to just two arbitrary choices. We could've just as easily assigned clockwise as out of the page, but we opted to assign counterclockwise as out of the page.
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 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.
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?
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.
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?
I have a question about the mitochondrial membrane, what happen if the mitochondrial membrane becomes hyperpermeable to proton, will that be a bad thing ?
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
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 🕉🕉🕉
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.
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.
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 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...
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 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.
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!
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!!
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
In 2019 and from Middle East, I am watching your video and I want to thank you 🙏
marhabaan
online education seems more effective than going to school and colleges
obviously not, *effective
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...
>implying this video is about grammar
anonymous clark haha....noope!
you mastermind jesus, do you live by the play hamilton? Ah yes
THIS WAS SO AWESOME!
Thank you! Undertaking Dynamics at university for mechanical engineering, never did physics, everyone expects that you've done it! Many 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!
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....
I learned more watching this video in 7 mins than I did in two weeks in my AP Physics 1 class
You are my Saviour, sir 💜
This video and the way your videos are produced is extremely helpful.
This is an excellent video Sir. Thank you.
So clear! Such a neat video! I love it! Subscribed at once! Thank you!
Thakn you so much sir from India
I fucking love the internet.
Your the man. Yes you are. thanks
He's the man.
Thank you! Gonna have a lab assignment in a couple of hours and this video cleared my confusion right up! excellent :)
thank you for simple and clear explanations
he looks like he could be a Green brother
S. You mean hank green's brother???
at 4:10, shouldn't your calculation show l = (15kg*m^2)(12 rad/s), and not 11 rad/s?
nah sig figs
yeah the calculations to get the velocity isnt shown so we can rely that sig figs round to 11
true he must have made a mistake but his explanations were so clear
great video, exactly what I searched for!
wow, really helpful video. Thank you!!
Why are you putting omega= 11rad/s
As given is 12rad/s
At4:20
I learned more in one short video than I did in 3 hours of lecture
backdraftvideos photos
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!
his name is Mr. Andersen
Great Video. What program are you using to film and present these videos?
Very precise explanation!
Thanks, really helpful video!
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 ;)
Nice guy
Nice vid. But when did 11 start to equal 12?? (@ 4m10s)
Sir thank u very much for this vdo but pls if u can make a video on laws of conservation of angular momentum pls.....
Very good educational video ! thanks !
@Bozeman Science how to understand that instantaneous angular displacement is Vector while finite angular displacement is scalar ? Can we have video regarding this topic ?
It took me forever to understand angular momentum;
I was pretty much thinking of it as "something spins there, and something else spins there".
When u started saying torque or inertia I sudnly detached from video
Amazing video. Thanks!
Where did the radians go at 4:08 in SI Units
Mahira Gulzar Radians are not "real" units. We use them as a reminder that we are using radians to begin with.
Why is angular momentum defined as it is? Is it just a quantity that its empirically observed to be conserved
Angular momentum is "Geek Talk" for circular rotation.
at 4:10 you wrote 11 rads instead of 12 rads... was that a mistake?
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.
True, an object can rotate about a completely different point than the point you use as an origin for angular momentum. This would ultimately mean that the object is both in rotation and translation combined, and you'd have to consider both phenomena simultaneously.
An object in pure translation does have angular momentum, as counterintuitive as it may be. The reason is that when it collides with an object that can rotate, it will cause rotation.
It usually is more convenient to consider angular momentum to be referenced to the axis of rotation.
Really did help !!
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.
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?
@@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)
@@EarlJohn61 dm
NERD
Why angular momentum has a direction at right angle to direction of linear momentum ? What is the significance of direction of angular momentum ?
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
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 a lot ^^
Really helpful
really! helpful.... thank you!!!!!
i have an doubt that when angular momentum is very large the the designed object what will be the result / effect of the object?
u are best in this world.......so where from you have came
WELL EXPLAINED
It's a great video about angular momentam..
1:10 r isnt written as a vector but it should be cuz u taking the vector product
2:30 what is making angular momentum to transfer from wheel to chair?
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
The torque that the person is applying to the handles of the wheel's axis.
Is there a difference between angular momentum and magnetic moment?
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.
Yarr u r fab fantastic, grt there is no need to go to college. U r doing great job
4:05 isn't that supposed to be L = (15kg m^2)(12 rad/s)? Why is it 11rad/s?
He takes average.
Thank you sir
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.
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
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?
Very well ☺️
Thank you
1:41 u cant take vector product of moment of intertia cuz its not a vector
True
thank you sir!
how come u didnt mutiple 15 x 12 rad /s but instead u did 12//// was that a mistake?
Isn’t the angular momentum for a disk L=1/2Iw ?
Assuming it is uniform, solid, and cylindrical, yes.
At 4:09 there is a mistake it must be w=12 rad/s not 11 rad/s ???
mohamed aaaly I dunno
@ 4:21 is angular velocity a vector? is I a vector?
Yeah it linearly spinning
Yes. We assign the direction to be along the axis of rotation according to the right hand rule, as a matter of convention. This is more of a matter of bookkeeping than reality, because nothing physical is happening in that direction. We opt to use the axis as the vector's direction, in order to reduce the number of arbitrary choices from a continuous plane of 360 degrees of arbitrary directions, to just two arbitrary choices. We could've just as easily assigned clockwise as out of the page, but we opted to assign counterclockwise as out of the page.
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!
Thank you. Just solved how I can create levitation awesome explanation
From India
Amazing!
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.
Star Messenger dude. u serious? research before u talk shit. I learnt this Right and Left HR in the 10th grade
What is the vertical analogue of angular momentum
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?
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.
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?
Very helpful
Sir very helpful.
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?
no
I have a question about the mitochondrial membrane, what happen if the mitochondrial membrane becomes hyperpermeable to proton, will that be a bad thing ?
Thanks!
Thank you. My physics maybe can be saved.😭
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
btw the earth turns/rotates on its axis AND orbits other bodies of gravitational masses
I was trying to learn about a broken planet at the bottom of it’s gravity well. The bottom of the funnel
😢thanku❤
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 🕉🕉🕉
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?
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.
so helpful
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.
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.
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.
if i is the moment inertia and e is kinetic energy , its angular momentum is
awesome
Could anyone explain to me why the angular momentum is perpendicular to the rotation?
Due to its association with tangential velocity
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 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...
The radian is a dimensionless unit. It is a ratio of arc length to radius.
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。
Where did the radians go when u multiply rad/s*kgm^2???? How does that come out to kgm^2/s?????!!!!
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.
Yup, those are frames a physics professor would select. Nice jawline.
I’m in high school and just curious, and I’m glad I was.
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.
❤