I tried the TOUGHEST Physics High School Exam Question

Here is my solution of the classic 2016 Rotational Mechanics JEE Advanced Question for the entrance exams to the IIT in India. Probably the toughest question to appear on the JEE Advanced. This is India's hardest exams and probably one of the hardest in the world.
Also note that these are not official solutions and if you spot a mistake, please leave a comment.
This is an excellent question on Rotational Mechanics, involving angular momentum, moment of inertia, angular speed and more obscure concepts such as spin and orbital angular momentum.
It is exceptionally hard and hence excellent revision for JEE Aspirants looking for extra practice.
I hope this video is useful!
This video is excellent preparation for physics olympiads, JEE Advanced, JEE Main, and even excellent practice for university courses in engineering and physics.
Chapters:
00:00 The Question
00:32 Part A
02:38 Part A Alternative
03:50 B - HARD!
10:45 Part C
12:37 Part D
16:48 My thoughts on this question

[zhelyo_physics]

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.

[infintzgaming]

Note: JEE ADVANCED is given by high school students at 17 year age

[haokipiit]

Everytime i see this question, brings back memories of JEE16. I felt the physics paper was very tough, i couldn't clear JEE Adv that year but I did it the following year. Try and try again, a little motivation for future aspirants.

[yash]

i love how u explain ur thinking process while solving the ques. many teachers online dont do that
respect

[JEE]

Another thing about this question is that you can't randomly jump on options to check them, have to go in sequence.

[hariw]

I gave my JEE in 2002, when we had just one exam, called IIT JEE. I had cleared the prelims. As a candidate from Kerala, where we didn't have dedicated IIT specific coaching, I was at a significant disadvantage to other well prepared candidates, where candidates often start their preps when they are 13 or so. The exam was so tough and questions so incomprehensible, I even slept through the physics portion of the exam, only for the examiner to wake me up. I've never felt so ill prepared and inadequate ever in my life, while giving an exam, a memory that still lives with me. The direct sunlight in my direction, oppressive heat in that classroom and my father coolly brushing my experience without even a hint of anger, those are memories of a life time.

[Rahuleditz]

Seriously this is the shortest & the most precise solution for this question on the whole YouTube 😮

[Aman-bk]

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 🇮🇳

[vishaldebroy]

Even my seniors from IIT yet not able to even understand this question lol

[AVIGOOO]

Crazy that youre sipped to solve this in under a minute

[Inserthandle-ffjw]

You're supposed to skip this question

[arop]

No formula sheet, log table, calculator or anything you can think of, we just have a piece of paper. 17/18 year olds take this test. Also you should be able to solve such questions around in 3 min to even hope to try all of them.

[riturajN]

Salute to the man who made this question...he has excellent intelligence 🤯

[PrakritiNathSarkar-vckf]

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

[dakshpatil]

Yup we do have to memorise moment of inertia of rods from end hinge, mid hinge, discs, rings, cylinders

[aimlesslad]

I love the way you actually solve it step- wise and paying attention to smallest of details… my teachers think I’m Einstein listening to their guest lecture

[ChinmayanandunkNk]

This question is hyped so much jee adavance questions on fluids are bit difficult than this one tbh

[ashwinikokare]

Hey bro ! Loved your enthusiasm while solving that question and making us understand at the same time. Really appreciate your efforts

[dr.vaibhavsharma]

As a doctor who left physics 10 years ago, it made little sense to me. Idk why I watched the full video. 😂😂

[aadityasinhchauhan]

Sir you explained very well, thank you ❤