So what question should I try next? 😀 P.S. I am already working on a modification of this question. I think it's time to introduce an initial push and a frictional force into the dynamics of the system.
@mangomanlassi7779
Жыл бұрын
nooooooo not friction
@zhelyo_physics
Жыл бұрын
@@mangomanlassi7779 😂😂
@samuelrojas3766
Жыл бұрын
What about some problems from IPhO 2022 or APhO 2022?
@mangomanlassi7779
Жыл бұрын
@@zhelyo_physics 😂😂😂
@shmkrar1153
Жыл бұрын
Yes, Dynamics! I too wanted to analyse the dynamics of this system
@infintzgaming9458
8 күн бұрын
Note: JEE ADVANCED is given by high school students at 17 year age
@44yash60
7 күн бұрын
f yeah man.. it's tough
@Horizon24129
7 күн бұрын
17 to 18
@srinathkollur7534
7 күн бұрын
That too there is a time limit to solve most of the questions. Can't stuck on one question...
@saritayadav9200
3 күн бұрын
Aa gaye sympathy lene
@LakshyaVatsa
2 күн бұрын
@@saritayadav9200i think theres nothing wrong to take sympathy from others l. Considering jee is a very hard and competitive exam so the constant well-being of the mind is very much needed. Moreover ppl should take pride in even preparing for this exam.
@JEE322
Жыл бұрын
Another thing about this question is that you can't randomly jump on options to check them, have to go in sequence.
@zhelyo_physics
Жыл бұрын
completely agree!! I think B being SO close to the real answer as well is tricky. Luckily I think a common mistake would be to calculate the total angular momentum with respect to the z axis which still produces a wrong answer I think. I need to check for d the answer you get if you add the two components to see if it still gives a wrong answer. But yeah... on some of these, you are doubting them until the last second!
@roadrash999
15 күн бұрын
The sequence is totally different on different paper sets (to deter cheating). So you can absolutely jump to options, no reason why not.
@Aman-b5k
26 күн бұрын
Thank you so much mate, for solving this.few months later I'm going to appear 2025jee so this concept would be clear for me with this video. ❤love from India 🇮🇳
@zhelyo_physics
25 күн бұрын
thank you so much for the comment!
@PrakritiNathSarkar-vc6kf
26 күн бұрын
Actually this is not the toughest question bits actually really hyped question The main thing about this questions is that angular velocity vectors and its components and instantaneous axis of rotn Jee has asked tougher question on fluid mechanics and electrodynamics you can have a look on them
@zhelyo_physics
22 күн бұрын
I'll have a browse, thank you!
@44yash60
7 күн бұрын
i love how u explain ur thinking process while solving the ques. many teachers online dont do that respect
@zhelyo_physics
7 күн бұрын
thank you so much! I find that's critical to a video/teaching.
@physicschemistryandquantum810
4 ай бұрын
Sir actually according to the official answer key the correct answer to this problem is B and D
@Shrek867
2 ай бұрын
Bro the answer is correct , maybe you referred.to any other region paper or something
@bhuvanbhaskar6041
25 күн бұрын
@@Shrek867wdym? The ans in the vid is absolutely wrong
@rishabhavvari1343
20 күн бұрын
Key gave a or ac due to the confusion of the students about the angular momentum, but the single option key given is the absolute correct one, option c doesn't account for the orbital angular momentum associated with the motion, but most of the books just give ac because no one's willing to check the problem and everyone tries to justify the key
@Abhinaytiwari418
Жыл бұрын
Loved ur explanation ,sir could u solve more question at level of jee advance but not the previous year rather new question from different book which can be at the level of jee advance
@zhelyo_physics
Жыл бұрын
Sure! Have a look at this one: kzitem.info/news/bejne/2m2ksHZmhWR0fW0
@Ayush-q9u
10 сағат бұрын
You have done a great job by explaining this question. But actually the correct answer is only option (A) .
@bhuvneshbhaskar2431
10 ай бұрын
You found the omega of smaller disc by a sneaky😁 and a very basic way for an advanced que then i wondered my dumb mind where is omega com Of assmebly Then i realised the omega of com and everthing about an axis is equal Wow ended half of the goat que of rotation(not for everyone) in a min People like you make me love physics more love you brother 🙏
@zhelyo_physics
10 ай бұрын
Thank you so much for the kind message! Much appreciated, well done on the problem!
@GamerX78623
12 күн бұрын
Its not toughest,Its hard because it was out of syllabus and it is studies in later studies in collese or later
@riyansaini36
3 күн бұрын
jee advanced have no particular syllabus its just ncert syllbus but as jee ask tough question jee prep books add them as new topic of the chapter , and it becomes new syllabus
@dkjakdljfkdjkajjr
16 күн бұрын
Imagine17 yr olds doing it😂
@zhelyo_physics
16 күн бұрын
Very difficult to problem to solve at that age, and at any!
@samyakgupta5773
Жыл бұрын
Any alternative way to find w of center of mass, can we use conservation of angular momentum also, might be wrong because I just started studying rotation
@deepssmeow
Жыл бұрын
This channel is very very underrated!
@zhelyo_physics
Жыл бұрын
Thank you very much for the kind comment!
@sumitvishwakarma1075
Жыл бұрын
This was a question from MIT PHD Physics exam which was done by high school students
@zhelyo_physics
Жыл бұрын
Wow has it actually appeared on a PhD exam? I have seen variations of this motion before to study the dynamics/kinematics of this motion before
@sumitvishwakarma1075
Жыл бұрын
@@zhelyo_physics yes and that question paper of 2016 was made by IIT Guwahati and there was also an another rotational dynamics comprehension question which was also interesting you should have a look on it
@sumitvishwakarma1075
Жыл бұрын
@@zhelyo_physics they do pick some questions from MIT's university's papers like they picked an integration problem from MIT integration Bee
@44yash60
7 күн бұрын
@@sumitvishwakarma1075 brother it was made by iit madras
@Ayush-q9u
10 сағат бұрын
@@44yash60 Bro 2017 JEE ADVANCE was made by IIT Madras. JEE ADV 2016 was actually made by IIT Guwahati.
@JEE322
Жыл бұрын
11:40 yes sir we have to memorize such formulas
@zhelyo_physics
Жыл бұрын
Thanks for the response! Argh, even trickier then, I was looking for an equation sheet in the paper :D
@mxminecraft9410
25 күн бұрын
@@zhelyo_physicsI believe memorizing doesn't make the question tricky tho such memorisation shouldn't be allowed to be asked tbh ( or should be provided in the question itself) it's a sad education system here .
@comptech5240
15 күн бұрын
@@mxminecraft9410 u don't need to memorise much. If MOI concept is clear then u can easily understand them as well. Now obviously under the JEE time crunch, remembering such values do help
@Abhinaytiwari418
Жыл бұрын
Sir can u pls solve this,really like ur solution ,this question is from jee advance 2020 fluid When water is filled carefully in a glass, one can fill it to a height h above the rim of the glass due to the surface tension of water. To calculate h just before water starts flowing, model the shape of the water above the rim as a disc of thickness h having semicircular edges, as shown schematically in the figure. When the pressure of water at the bottom of this disc exceeds what can be withstood due to the surface tension, the water surface breaks near the rim and water starts flowing from there. If the density of water, its surface tension and the acceleration due to gravity are 103kg m−3 , 0.07 Nm−1 and 10 ms −2 , respectively, the value of h (in mm) is
@Abhinaytiwari418
Жыл бұрын
It's 2020 paper 1 question 14
@zhelyo_physics
Жыл бұрын
thanks a lot! I will have a look!
@imademedikasurya3917
Жыл бұрын
I want to ask you about Indonesia National physics olympiad question, where should I sent it to you?
@zhelyo_physics
Жыл бұрын
Best way is to leave a comment here
@KushagraNath-o3p
Ай бұрын
Really appreciate Your content.I am Jee aspirant. Such questions are tough and may seem daunting but for us its everyday life. The reason is if you look at our solutions they will seem mechanical and robot like. By continous practice the thinking process is memorized by our brain. That is why personally things like PART A can be solved in a few seconds by just imagining the situation. However Part B is much more difficult as it is not a known or seemingly familiar situation. It was actually Removed from the answer key( It doesnt matter whether you mark the option or not) Its been discussed heavily in this video kzitem.info/news/bejne/mrCI2qCapH6Hg3Ysi=KbnLCVvKqaiHzb_5 Also lastly. Dont take the 2 min per question thing to heart. In reality you dont need to solve every question. solving 80% questions with high accuracy gets you and amazing rank. Also to pass the exam you need 30% or so. Paper attempting strategy also involves knowing which questions to skip.( Personally when I attempted this question as a test I marked part A in 30s and after that i realized it was too lengthy. Thus i only spent 1 min in total and gained all 4 marks :) )
@zhelyo_physics
Ай бұрын
This is a super interesting insight. Thank you so much for the comment and the valuable info. All the best and good luck!
@oneshotff2898
7 күн бұрын
wow got recommended early😂 btw im also appearing on 2025 jee few months left im willing to show some of my own questions i bet its tougher than these😈 but this rotaional question was out of syllabus though
@zhelyo_physics
7 күн бұрын
good luck preparing!
@oneshotff2898
7 күн бұрын
@@zhelyo_physics thanks 🥰
@adityarana13
Жыл бұрын
Hey Sir I hope you have a good life I also want you to try a question in jee advanced 2017 another question from rotational motion I don't know the questions but it is A twirl in a hand type of question it was hard as he'll and where underrated until you find a small trick of it I want you to figure it out😊☺
@zhelyo_physics
Жыл бұрын
Oh! I actually looked at that question yesterday and it looks very interesting : )
@adityarana13
Жыл бұрын
Thank you sir for the reply and I hope your next video will have more views because there are many less people in world which love physics and have a value of it
@zhelyo_physics
Жыл бұрын
thank you so much!
@akash7152
Жыл бұрын
Please make a book recommendation video not for any exam but for Physics
@zhelyo_physics
Жыл бұрын
Thanks for the idea! Will do
@zhelyo_physics
Жыл бұрын
Actually I have used those two extensively: kzitem.info/news/bejne/yqB-4IBmhnSVm6g , kzitem.info/news/bejne/tph5yJNjgKaJZ3o Additionally, Halliday Resnick and Physics by Ohanian is amazing. Just some recommendations.
@enderman4514
Жыл бұрын
@@zhelyo_physics halliday resnick just never ends 😭
@arsh_arora10
25 күн бұрын
@@enderman4514for real bro 😢
@ShrFf
25 күн бұрын
its just a game of rotational mechanics , general geometry and center of mass
@vatsal409
Күн бұрын
It has to be done with in 3 mins
@DoraemonMS903-k1g
26 күн бұрын
IIT Guwahati 🎉🔥😳💯
@shyamsundar4665
Жыл бұрын
Should the orbital angular momentum not make an angle with orbital angular velocity because they are not supposed to be parallel for unsymmetrical mass distribution
@zhelyo_physics
Жыл бұрын
Hm, I agree, excellent point. My solution treats the orbiting assembly as an orbiting point mass. You can also: Find Lo about by finding the moment of inertia with respect to the z axis of the rotating assembly and multiplying it by ω_z which is ω/5 I don't see an easy way of finding this but I can have a go this week. Let me know if you do before me!
@Thermodynamics-l3t
Күн бұрын
After this question My confidence commit suci..de
@ViralvideoYouTubeSameerHusain
5 ай бұрын
Wow sir you explained nicely ❤❤❤❤❤❤❤❤❤❤❤
@zhelyo_physics
5 ай бұрын
thank you for the comment!
@ViralvideoYouTubeSameerHusain
5 ай бұрын
@@zhelyo_physics welcome sir❤❤❤🌹🌹🌹🌹🌹❤❤❤❤❤❤
@jaykugosenpai9393
26 күн бұрын
When you calculated the moment of inertia at 5:43 was it like instantaneous? because in the very next second the direction would change! And why didnt you consider the horizontal component of the distance of the center of mass instead?
@zhelyo_physics
21 күн бұрын
Good questions! during rotation the magnitude of the moment of inertia should remain constant as the distance 9/5l is not changing during the rotation. I guess the distance l is along the length and considers both the vertical and horizontal components. It's quite a bit easier to treat it this way than to decompose it to separate components to reach the same result, I think! (it's been a while since I solved this question though)
@dhruvchoudhary4143
16 күн бұрын
but the correct answer given on a jee advanced website is b,d or d
@Ayush-q9u
10 сағат бұрын
Which Website. I think you did not read the options. The options can be in different sequences. The correct answer is A Or A, C according to the options in this video . C is actually wrong but they gave it the correct . Because to analyse the motion of this system in the exam hall is really tough as it is not in the syllabus. But who did not mark the option C & marked only A is absolutely the most intelligent so they gave full marks to both the students at that time. Now if you want to know more about Option C then you should talk about it with your physics teacher or you can watch SBT physics channel JEE Physics the video is about 1hour long. But all your doubts about it can be solved.
@BasisthaAnand
Ай бұрын
I came here after tom nightmared you with mat questions😅😅😅😅
@zhelyo_physics
Ай бұрын
😂😂 I should have given him this question!! Maybe next year 😁
@BasisthaAnand
Ай бұрын
@@zhelyo_physics yeahh😂
@dhruvm.s.1103
4 ай бұрын
C is not correct
@Meyouknowd
9 ай бұрын
Moment of inertia ???
@zhelyo_physics
9 ай бұрын
all explained here if it helps! kzitem.info/news/bejne/ypukyZmIeqGjaGUsi=m13rcXbn1_r7J0h7
@raqueebshakir6671
5 күн бұрын
Correct answer is (D) or (B),(D)
@Ayush-q9u
10 сағат бұрын
No brother you are wrong plzz check it's answer in your coaching module or any other book.
@almostok692
4 ай бұрын
At 3:44 you used Wr=V , why can’t we write Wz(perpendicular distance of centre of disc from z axis)= Velocity of centre of disc?
@amkai2928
23 күн бұрын
What? What do u want to say? W(omega) is just perpendicular dist×radius of disc.
@SubhanilChoudhury
Ай бұрын
solution of angular momentum about O is wrong
@zhelyo_physics
Ай бұрын
Could you please elaborate why? Thank you.
@indianbeast644
Жыл бұрын
Sir can you also include ray optics from ipho
@zhelyo_physics
Жыл бұрын
On the list it goes 😀
@Psuuuuuuu
24 күн бұрын
I am solve this question in 6 min in exam
@dhruvdubey2119
23 күн бұрын
Joker😂
@HORW-l8n
21 күн бұрын
I knew from your English
@Ayush-q9u
10 сағат бұрын
By marking only option (A) you got full marks. So you thought you solved the question 😂😂.
@parvgoyal7997
9 күн бұрын
Anyone not in PHD...... Don't try to go at depth of this question. U will end up with no benefit
@oneshotff2898
7 күн бұрын
hn bhai😂
@caba3995
3 ай бұрын
You got almost all questions wrong.
@zhelyo_physics
3 ай бұрын
happy to be corrected if you drop me a comment which parts exactly. Thanks!
@NotsoFunnyValentine
2 ай бұрын
@@zhelyo_physicsno sir , your answer was correct , he is probably talking about his regional paper
@OmarWehbeh-hXO
7 ай бұрын
Not very difficult but a still a good question tho
@SandhyaSengar-ol9rk
29 күн бұрын
😂 if you say that, you are either reincarnation of Sir Issac Newton or a liar.
@Ayush-q9u
10 сағат бұрын
Solving a question is a situation depending also. Solving questions in an exam hall is different from solving it at home and different when solving it in the classroom.
Пікірлер: 111