Solving one of the toughest Indian exam questions

In hindsight the final line of algebra isn't actually too bad and could be done by hand in a few steps but is just annoying at the end of a long question.

This is wrong answer . I checked in jee advance website.

this was excellent explanation

I think I might have understood about 4 words in this video.

When i am in 11th class our teacher solving this question in our class 😊

Proud to be an jee advanced aspirant 🙂

I am jee aspirant and our teacher solving this question in our class 🙂

I think C option is wrong. Why are we not considering relative motion of the bodies wrt com when writing L about com?🫤

3 minutes for this is almost impossible. its more memorisation of the same questions and compare them with each other and know whats right not calculate it.

I was able to solve it and my method was much simpler.
But as I heard its one of the toughest question so it boosted my confidence so much.☺️☺️

Its ans is (b and d or d )

Ans give in answer sheet is ( B,D or D )

Ummm guys i solved this question before thinking that it was hard for everyone OMG 😮😮
But i could only solve half of it

How, everyday i wonder how did i solve these questions? Lol.

Part C is actually wrong

About axis through COM parallel to Ω the moment of inertia(from parallel axis theorem) is (1/4)*ma^2+m(4l/5)^2+(1/4)*4m*(2a)^2 + 4m (l/5)^2 and angular speed about it is Ω. Hence angular momentum about COM won't be just 17ma^2ω/2, it should have additional term right?

You take 21 minutes but in examination hall you have 3 min to do ..

i appeared in jee advance 2023 when i face question on chimney problem which was toughest question in 2023 .
please make a video on it.

I wanted to ask that when we got the angular velocity about the O axis and then to z axis we get w/5 and if we resolve the angular velocity about c o m we have w and its component on z axis is also w/5,wouldn't they cancel each other out?

And we have to solve 90 questions like this

I think length and breadth are equal

This is actually one of the easiest jee questions😂😅


Don't mind me, I'm in second year of mechanical engineering. NIT Calicut.


It's is definitely difficult for a jee aspirant😅

Option C is incorrect

The point is if you can use these equations to make a device because practical engineering is far removed from theory? Engineers use imagination, straight forward calculations and skills to connect individual parts to create a working device.

I am a 8th grader and has started prep from 6th class now i managed to solve it

Students giving the exams have to solve it in around two and half minute not 21 minutes

There's one thing i don't understand, when you solved option "a" why did you only take a component of capital omega and not omega on z axis.

some jee advance questions are not given to be solved by students in the exam hall, they are given to eat up time and also do mistake. like a speed breaker

And those aspirants literally have to solve this question in 3-4 mins 💀

i got the answer in 5 minutes i have done it by finding velocity of center of mass

I'm a little rusty on my physics skills given I haven't solved any for about 10 years now but it'll be great if someone can explain why we're considering the offset axis. My reasoning is if we think about, say, the disc with mass m, the center of the disc is rotating around the z-axis with a velocity a⍵ and radius of rotation l*cos𝛩. Essentially, how is considering disc of mass m, radius a rotating with angular velocity ⍵ at axis tilted by an angle 𝛩 with xy plane, around z axis different from considering a point mass m with linear velocity a⍵ rotation around z axis with a radius l*cos𝛩? Apologies if I'm missing something obvious.

and i imagine to be a JEE aspirant

Indian education system is horrible

I just cried

It's questions like these that reminds the insane gap of level of education my country has in comparison to countries like India.

As in 9, I was trying to solve it by the equations of 9th standard
Lol😅
This is the condition of 1 question, what about other

I really liked the part where you taught us how to find the centre of mess.

But for part c if u consider a different axis passing through the centre of mass, you get a different answer. Here u are considering the angular velocity about the axis passing through centre of mass

And they attend the exam at the age of 17-18 yrs

Our coaching teacher struggled in this Q for 30mins then we arrived at ans

All who think it is hard you are wrong ,
It's ultra hard when you try to do it in the exam Hall with a lot of stress and pressure.
Just imagine.

Feels nice when you know you can solve it

JEE ADVANCE 🔥

as a 16y/o student preparing for jee, we did this question in our institute classes and it was far easier than the rest of the jee adv questions we did. Majority of the kids were able to complete this answer, its like a classic question associated with JEE ADV

Sister its two minute question in real exam but you take nearly 22 minutes, see how much struggle the indian students do before exam. 😊

even getting a 5 on physics C and 1 I still can't do this problem

Jee 2016 darkest year of jee adv 😂

Im indian im not gonna survive😭😭