To see subtitles in other languages: Click on the gear symbol under the video, then click on "subtitles." Then select the language (You may need to scroll up and down to see all the languages available). --To change subtitle appearance: Scroll to the top of the language selection window and click "options." In the options window you can, for example, choose a different font color and background color, and set the "background opacity" to 100% to help make the subtitles more readable. --To turn the subtitles "on" or "off" altogether: Click the "CC" button under the video. --If you believe that the translation in the subtitles can be improved, please send me an email.
I recently created a Patreon account for people who want to help support my channel. The link is on my RU-vid home page. Also, in case, you have not already seen them, I uploaded several other videos recently. As always, for each video that you like, you can help more people find it in their RU-vid search engine by clicking the like button, and writing a comment. Lots more videos are coming very soon. Thanks.
+Physics Videos by Eugene Khutoryansky I m watching your video 9th class and now I m 1st year(11th class) and still watching................. Your physics videos, animations and explanation are the best...............
Physics Videos by Eugene Khutoryansky You're one of the best teachers I've had in physics, but somethings been boggling my mind for a while and this video is a perfect opportunity to ask. Could you please explain how the smaller object when colliding with the bigger one(2.25) does not stop. I know in real life it would bounce off but according to Newton's laws of motion it shouldn't. According to Newton's third law, there should be an equal and opposite reactionary force on the smaller ball when it applies a force on the bigger ball and since force is equal to the change of momentum, when the bigger ball applies the equal and opposite force, the smaller ball should stop as the force it exerts is equal to it's momentum. This doesn't happen in real life. Something that may help you that I've thought of, is from a different example. Consider the smaller ball now stationary, and the bigger ball is moving toward it at a constant velocity. Same situation but the roles switched. When the bigger ball hits the smaller ball, I used to think the bigger ball should stop as the smaller ball produces an equal and opposite force to stop it. But then I realised that the bigger ball does not have to exert its full momentum onto the smaller ball, but only enough so that the move at a similar speed. So the momentum of the larger ball only decreases by a smaller amount as it takes less force to get the smaller ball moving at the same speed. That's my reasoning, unfortunately it does not explain what I mentioned earlier. My reasoning lead me to think that the smaller ball has to exert a larger force than its momentum can give to the larger ball, but it then gets cancelled out when the larger ball exerting the same amount of extra force to the smaller ball making it move in the opposite direction. However the reasoning mentioned in the last paragraph alludes to there being a conservation of velocity which definitely sounds untrue. I hope you read and understand my long winded messy post and give some kind of solution based on what you can understand of what I am saying, I hope I'm not wasting your time, sorry :)
You can help translate this video by adding subtitles in other languages. To add a translation, click on the following link: ru-vid.com_video?v=PNHSIEO-KOQ&ref=share You will then be able to add translations for all the subtitles. You will also be able to provide a translation for the title of the video. Please remember to hit the submit button for both the title and for the subtitles, as they are submitted separately. Details about adding translations is available at support.google.com/youtube/answer/6054623?hl=en Thanks.
VERY well presented. Being a young adult yearning off the knowledge of theoretical physics, I found this video to be sufficient and explanatory. Great work, Eugene!
@ Not necessarily true. I've earned a degree in Physics but getting a Doctorates in Electrical engineering. In other words, there is a physics background even if it's scope is just courses in physics. Electrical engineers are required to take physics as part of their program.
Please allow the download button on this video....then I can watch it another few hundred times on my television. Your videos are always high quality due to the clear and concise instructions. Thanks you for putting the time into educating everyone.
Suddenly I get the appropriateness of 'The Blue Danube' (think 2001). Docking with the space station is an exercise in balancing angular momentum as well. Bravo!
Thank you very much for this high quality content. You have a really good manner to explain this theoretical concept very easily. I read about moment of momentum before. I had understood the mathematics behind this object. But I could not figure out correctly how to physically represent it in real life, and the consequences of this concept. For instance, the increasing or decreasing velocity with the opposite decreasing or increasing of rotation radius. With your video is definitely very clear. There is so many other subjects you could represent and explain like this.
A very nice and clear explanation of a rather confusing topic (angular momentum). Thanks so much! Ill definitely be passing this video along to my students.
Hi Eugene, very nice video! Could you make a video about the dzhanibekov effect (instability when rotating around the intermediate axis of rotation). I can't grasp my head around it how angular momentum is conserved during this effect.
This lecture is like listening a speech in a Royal Party (by closing eye) Feels like present in the 1st Class Prog. in something like the Titanic. Excellent Video
@@EugeneKhutoryansky I am very surprised by your reply sir . And like your million subscribers even I wish to be speaking with you sir (I also know that it wouldn't happen 😅. If that happens means I will reach HD1 galaxy itself sir .And within 272 days I will complete my schooling and I will be free for 3 to 4 months after that.... So due to that (it may sound stupid) can you be my greatest and wonderful and genius physics teacher?? Thank you once again sir for your free high quality videos we students are very much grateful to you.. Consider the first paragraph sir 😄
Mashallah,,what a nice and informative videos with pleasent voice,,,,,,what a student can get something from books an hour,,,he can get that in just 10 or 15 mint by watching these video,,,,,,,,,I appreciat u with open heart,,,,it is request to please upload video on fluid mechanis as well as solid mechanics
@@EugeneKhutoryansky thank you, actually. Please make videos more on physics with great animations and everything. Especially about electricity, mechanics and thermodynamics. I know you will deliver the best.
Holy moly this parallelogram thing is keplers equal area law , a proof for it, explaining the varying speed in elliptical orbits as the distance between the point and object varies. Holy shit
You're one of the best teachers I've had in physics, but somethings been boggling my mind for a while and this video is a perfect opportunity to ask. Could you please explain how the smaller object when colliding with the bigger one(2.25) does not stop. I know in real life it would bounce off but according to Newton's laws of motion it shouldn't. According to Newton's third law, there should be an equal and opposite reactionary force on the smaller ball when it applies a force on the bigger ball and since force is equal to the change of momentum, when the bigger ball applies the equal and opposite force, the smaller ball should stop as the force it exerts is equal to it's momentum. This doesn't happen in real life. Something that may help you that I've thought of, is from a different example. Consider the smaller ball now stationary, and the bigger ball is moving toward it at a constant velocity. Same situation but the roles switched. When the bigger ball hits the smaller ball, I used to think the bigger ball should stop as the smaller ball produces an equal and opposite force to stop it. But then I realised that the bigger ball does not have to exert its full momentum onto the smaller ball, but only enough so that the move at a similar speed. So the momentum of the larger ball only decreases by a smaller amount as it takes less force to get the smaller ball moving at the same speed. That's my reasoning, unfortunately it does not explain what I mentioned earlier. My reasoning lead me to think that the smaller ball has to exert a larger force than its momentum can give to the larger ball, but it then gets cancelled out when the larger ball exerting the same amount of extra force to the smaller ball making it move in the opposite direction. However the reasoning mentioned in the last paragraph alludes to there being a conservation of velocity which definitely sounds untrue. I hope you read and understand my long winded messy post and give some kind of solution based on what you can understand of what I am saying, I hope I'm not wasting your time, sorry :)
Meeharbi N the reaction is the one object stopping. the force brings the object to zero so there still is a equal and opposite force but it's just the perfect amount to stop it and not have the ball move in another direction
Meeharbi N it depends also on how elastic the collision is and if energy is lost in the collision. it does happen all the time so you saying it doesn't is simply wrong
You are understanding is incorrect. Please to refer to F=ma . let m1 be the smaller ball and m2 be the bigger ball and also let's assume m1= 1kg and m2= 10kg . then after collision between the balls it is abvious the smaller ball will bounce back with greater acceleration that the bigger ball. In this case, by the equation f=ma , we can safely say that it's acceleration (lets assume m1 acceleration be a1 and m2 acceleration be a2) wil be in the ratio 10:1 so as to show f=m1.a1 = m2.a2.
Hello Mr. or Ms. Khutoryansky, First of all your videos are amazing. Thanks to them i really started to enjoy physics , because now i can visualize the physical concepts and notions much easier and they are nomore boring ,abstract stuff. I just wanted to ask the following : Shouldn't the parallelogram in 5:08 and following 20 seconds be a triangle so the angular momentum ( the field of the triangle ) stays constant ? Thank you very much again.
Please make some animations in mechanics 1 lessons...involving work-energy-power, pulley systems and projectiles...thanks a lot for the highly informative physics videos
question..... if the ball rotating around an axis has a certain linear momentum, by changing its distance from the center, the linear velocity has to be changed (in order to keep angular momentum constant) which means that the kinetic energy is changed without any external energy source and it seems to be violation of energy conservation. than how can that be possible ...please explain it @Eugene
To change the ball's distance from the center, a force is applied, thereby adding or removing energy from the system. The energy is being transferred to or away the source of the force.
+Shirshak Bajgain, thanks for that really great compliment, and I am glad that you liked that I used a parallelogram to explain cross product. I also have a parallelogram to explain cross product in my video on Maxwell's Laws, to explain the strength of the force create by a magnetic field on a moving charged particle. Thanks.
The video was Amazing!!! I wonder how you managed to do such stunning animations??? It was really great, keep making more videos like this... And can you tell me how were you able to create these 3d animations did you use any software o'what? Pls, tell I would like to know???
Thanks for the compliment. I make my 3D animations with "Poser", and I do some of the simulations with an add-on purchased separately called "Poser Physics", in addition to the built in simulator called "Bullet Physics." Poser is expensive, but there are also free 3D animation programs available, such as "Blender" and "Daz Studio."
Thank you very much for this video! I have a question, is there a way to know why the angular momentum is at 90°? (Momentum that is apparently to the right of the object, assuming that the direction to which the object moves is the "front"). Edit: I have no idea, but if I had to guess, I'd say it's like the "residual force" from the axis, which would make the orbits to slowly lose force.
Good video. I´d suggest making better cuts while editing. This video could be a lot shorter without the silent 3-4 seconds transitions from animation to animation. Remember people watching can pause if they need to, don´t do it for them. Hope you read this, good luck.
"Linear momentum is also conserved, since we started out with a linear momentum of zero and ended up with a linear momentum of zero." ~deeply refers to "us" idly sitting, watching this video out of boredom.
One way to define inertia is mass's tendency to keep an individual object's linear (and angular) momentum. Linear momentum can be said to be the required quantity that requires an external force and some time in order to "destroy" it or increase it.
@@mangaka08 I am totally satisfied with your explanation. Thanks . Just wanted know Can we call Momentum rate of motion ? or work done? or type of energy? or force?
@@LinuxLuddite Kinetic energy is significantly more sensitive to velocity than it is to mass. KE also ignores the direction of velocity, because squaring velocity is a self dot product that eliminates the direction. Momentum is equally sensitive to both terms, and maintains the same direction as the direction of velocity. Start with mass, i.e. inertia. Integrate with respect to velocity from rest once, and you get momentum. Integrate with respect to velocity from rest a second time, and you get kinetic energy. This is where the 1/2 comes from in the kinetic energy formula.
Why did we define the standard such that fermions have half-integer spin? Why not just cut the reference spin value in half, and give fermions a spin number of 1, and bosons a spin number of even integers? I'm not trying to ask rhetorically, I really would like to know what was behind setting up the standard for spin numbers in quantum mechanics, that caused half-integer spins to exist.
What happens when the distance between the rotaing objects goes to infinity? In that case the areas seems to go to zero. Is angular momentum no longer conserved at infinity?
+John Lux, thanks for the compliment. In reply to your question, when the Sun exerts a gravitational attraction on the Earth, the Earth exerts a gravitational attraction on the Sun. I show an animation of this in my "Laws of Motion" video. Thanks.
