Moment of Inertia Tricks | Rigid Body Dynamics for JEE Main & Advanced | Class 11

[@physicsgalaxyworld]

Practice Quiz Questions on the concepts explained in above video are given below. Students can solve these questions and post all answers in reply to this comment and check which of the following given answers are wrong. Correct answers will be shared in 2 days with detailed solutions. More such questions and further preparation of JEE Mains and Advanced students can follow Physics Galaxy Advance Illustration book and check all our books and their content on the link - edyapp.com/physics-galaxy-books. (1) A thin square plate of mass M, edge length L is rotating about an axis passing through its center of mass, in its plane and at an angle 30° to one of the edge. If half of plate on one side of axis is removed, find moment of inertia of remaining part about this axis of rotation. [ML²/24] (2) Find moment of inertia of a Cylinder of mass M, radius R and length L is rotating about an axis of rotation passing through center of one of the circular face of cylinder and perpendicular to central axis of cylinder. [(1/12)ML²+(1/4)MR²] (3) A cone of mass M, base radius R and Length L is rotating about its central vertical axis of rotation with its base horizontal. If it is cut in two parts of equal mass M/2 by a horizontal plane parallel to its base and I1 and I2 be the moment of inertial of upper and lower parts of cone then find the ratio I1/I2. [1/(2^(5/3)-1)] (4) Find moment of inertia of a hemispherical shell of mass M, inner radius r and outer radius R about an axis of rotation passing through center and perpendicular to its base. (Calculate using the trick explained in above video) [2M(R⁵ - r⁵)/5(R³-r³)] (5) A plate of mass m having the shape of a right triangle of edge lengths a,a,a√2 is rotated about a given axis of rotation parallel to one side of length a and passing through the vertex where other side and diagonal intersect. Find moment of inertia of plate about this axis of rotation. [7Ma²/6]

[@harishmokashi338]

Sir plz discuss these questions

[@VinodKumar-tp1tw]

Sir please explain 2,3,4 question sir...

[@suchendrakumaryakkala6253]

Answers given for 2,3,4,5 are correct. First question is not clear. Thanks for the video.

[@aabhassingh977]

Can your hier some teachers of chemistry and maths to make revision checklist of jee syllabus same like physics.lt would be grateful . It will not only help me but many students . Please make it before jee mains 2021 April attempt

[@manasladdha4601]

The solutions to these questions will be shared in a video format?

[@VikashKumar-ke8mq]

10:15 Moi about axis perpendicular to plane (I)= M( L^2 + L^2)/12 = M(L^2)/6 by perpendicular axis theorem, I = I1 + I2 (where I1 and I2 are MOI about diagonal axis on the plane of rectangular plate) => I1 = I2 = I/2 = M(L^2)/12 (since rectangular plate is symmetrical I1 and I2 are same) Now we cut the plate about a diagonal axis into two parts and that part again into 2 parts, and now we have the triangular laminar plate given in the ques... since these parts are symmetrical about the axis, the MOI wont change... So MOI of the triangular laminar plate I = M(L^2)/12 I = M(a^2)/6 Note: I lost all my braincells trying to figure out why you substituted the mass plate as 4M first which makes the mass of triangular plate in ur assumption as M and then you substituted the mass of triangular plate again as (M/4) , which did not sit right with me... so i present to u my solution

[@vanshbindal3718]

The mass of plate is not again substituted as M/4 the mass of plate would be 4M/4 but Ashish sir cancelled one of the 4 in the latter step..

[@pushpendubaidya_honest_talk]

Legendary faculty

[@parkhigoyal2405]

Dear sir, You are the only teacher I have seen till date who is also teaching in an offline institute but still helping students with a noble heart❤️ Loads of love nd respect to you sir 🙏 A true definition of teacher😊🙏 Multimillion folds thank you to the entire *physics* * Galaxy * *team* and *Ashish* *sir* ❤️❤️😊

[@yuvrajsoni6799]

Mohit tyGi sir ka naam suna hai ??

[@gauravmakhija744]

@@yuvrajsoni6799 op bro but sir is still under rated

[@unheardvoice6217]

@@yuvrajsoni6799 dono hi badiya teachers hai , teachers ka comparision kyu kar rhe ho faaltu me ?

[@BLADE_PLASMA]

@@yuvrajsoni6799 ghanta kuch पढ़ाता है 😂

[@nishantkrishna813]

Thanks for everything, you changed my future

[@ShyamKumar-ne4qw]

Sir, this theorem is called "Theorem of Symmetrical Expansion". My teacher also have taught this , but this theorem is not present in books generally ..

[@physicsgalaxyworld]

This is called 'Mass Distribution Property of Moment of Inertia' explained in Physics Galaxy Vol 1 Page 293 Article 5.2.5

[@satyakar9453]

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@@physicsgalaxyworld trolling level :god

[@HimanshuSingh-bd8sp]

Lol

[@HimanshuSingh-bd8sp]

@physics galaxy

[@manaspatil3996]

Some days you click fastest to open a video, some days to Set the Reminder. But I hope everyday we get to see you and get the benefit of your knowledge, Sir.

[@jeswanthgrandhi]

Sir, If I become at least half as talented, energetic and knowledgeable as you are, I will consider myself as a most successful physics teacher. 🙏🙏🙏🙏

[@AMAR-pc6ht]

Same here bro, but i will achieve ashish Sir's level one day, 👈

[@ankeshpandey9640]

@@AMAR-pc6ht not only the level of physics but the down to earth nature ,The simplicity dedication for physics and student's .

[@alphaiitd1]

Feynman coughs in background.

[@uraharakisuke5305]

He has been teaching this since 1992 man.

[@Newphone-m8j]

​​@@alphaiitd1 tell him to stop smoking too much

[@akhileshnevatia995]

Cant wait for this sir!

[@pradeepkumarjaiswal5486]

most awaited topic

[@priyasharma9305]

3:45 I was thinking of the same thing.😇😇✌️

[@Abhishekshukla-ml4ws]

Mujhe sir ka padhane ka tarika bahut pasand hai...kyoonki sir kitna interested hokar aur kitna fast padhante hai.... isiliye kai bar mai faltu hi ajata hoon dekhne video😂

[@physicsgalaxyworld]

beta padhai kabhi faaltu nahi jaati, rest assured

[@Abhishekshukla-ml4ws]

@@physicsgalaxyworld yes sir 🙏

[@anmolmangaraj2492]

Sir i just completed this 😎😎😎.i hope sir will definitely bring a mindblowing video

[@suryansh731]

Poji ne maa chodi😂

[@aksingh3167]

361K subscribers , amazing sir , I think at the end of 2020 , you will hit 500K

[@najabajajajara]

sir as in sphere case in 8:41 IA+IB=2/5MR^2 HOW COULD IB greater than 2/5mr^2. If IB> 2/5mr^2 then IA should be negative. how moment of inertia is negative sir.

[@royi3063]

Masses will be different

[@NishantKumar-gx9co]

Sir cuboid wale case me mass Ko M/2 Kiya ... Fir length Ko L/2 kyu nhi kiya

[@ashurockworldinkanpu]

Due to identical shape moi remains same bas Maas change hoga

[@nishapatel3973]

Pichlae ke pichlae case mein bhi nahi kiya tha

[@cr00723]

Same problem

[@deidera9597]

kyuki vo com se hi pas ho rha hai bhaiya. Vo jo rod ke case me bataya tha L/2 woh uske end se tha.

[@utkarshjavalkar602]

Someone explain why Ib is greater than (2/5)MR² at 8:46

[@subham2509]

kuki mass is far from axis as compared to A and here M is mass of that part

[@sahilshrivastava5398]

Sir, at 3:04 why didnt you have the length of the part? I could not get this! Please reply sir!

[@shivammittal551]

Same i have also same doubt

[@vidhanpatni8338]

6:23 The sphere looks like the same thing Bahubali 😎used in the final battle.... Jokes apart, very helpful video sir!

[@SHAN0171]

Thank u sir.. Lots of love & respect❤❤

[@aranyaagrawal8585]

sir at 3:00 won't the length of the rod also reduce to half?

[@theabuzerbharuchi]

Same doubt

[@edutech3270]

Just see that it is behaving as mass of body is changed but shape is same , so just change mass here.

[@manakarohi4464]

Sir , at 6:24 is the I of cuboid M(L²+b²)/24 due to mass distribution please reply I am correct or wrong

[@prakharsingh7766]

Sir, if I am preparing for jee mains only, should I do the advanced illustrations on your channel?

[@anuragupadhyay8924]

No prakhar you must do b/c those questions are really awesome and the resource for revision also

[@physicsgalaxyworld]

If your focus is JEE Mains, then first you should follow concept videos, revision checklist and after confidence on your practice you have available time then further you can strengthen your concepts using PG advanced illustrations.

[@chakradhar5884]

@@anuragupadhyay8924 what are b/c questions??

[@utkarshmishra7090]

Prakhar now since Nta has taken charge of conducting papers there is not a lot of difference in jee main and advanced so u should definitely see those videos and enhance ur approach and also knowledge.

[@dhruvmohanshukla8933]

@@utkarshmishra7090 kya bol rhe ho bhai Ab jee mains Babur Easy ho Chuka hai Wo Jee Advance ke aajju baaju bhi nahi hai NTA ne Sb Barbarad kr diya hai

[@jmcstudios10]

Beautifully explained sir. Thanks a lot 👍

[@ajit30jain]

sir at 8:45 won't even I b be less than 2/5 MR^2? could you please check

[@Dailyshorts4512]

Sir your videos are really helpful 🙏🏻 Thank you sir

[@prahladtandan3892]

Legend of physics Ashish sir

[@udayk4857]

PG teams is doing great......it's very important to visualise ...thanku sir

[@aimvsdream]

IIT hua??

[@CycleEnder]

@@aimvsdreamTera hua?

[@aimvsdream]

@@CycleEnder Abhi class 12 mai hu...2024 mai hai mera

[@adityapal592]

@@aimvsdream hua ?

[@n.k.prasad7567]

Excellent respected sir. NK Prasad Physics teacher

[@jennie1913.]

Sir is it helpful for neet aspirants also.. I meant to say there Is no need to practise advanced level questions for neet...????...

[@tapaskumarsamanta1995]

The visualisation is just 👌👌👌 great

[@harishsharma7225]

Thank you sirr ....this was a very useful trick Love u sir

[@Ismail_Haque]

Tirck from Ashis sir mtlb trick nahi maha trick😊😊😊😊💚💛💙

[@siddhesh8710]

Sir in yesterday's video you said that jee advanced is a different ball game . Can you please make video on explanation of this ball game . Please sir make one video on jee advanced....

[@physicsgalaxyworld]

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[@siddhesh8710]

@@physicsgalaxyworld thank you sir ... I am very thankful for physics Galaxy team and legend sir ashish arora sir . ❤️

[@Enchanted_156]

@@physicsgalaxyworld 😁

[@divyanshgupta1057]

At 3:38 why have mass and length been divided by 2??

[@siddhantdash3297]

Sir please make more such videos

[@shivamkumarshivamkumar6229]

Kash aise teachers mil jaye chemistry or maths me bhi😔.

[@mihirjha7417]

Sir please one request!!, please make full strategy video containing time table, how to follow PG books, time for practice, tests, other material to follow that purely focusses on JEE Advanced 2021.. please sir make a video, please don't wait for more same type of requests this would be very very helpful for the viewers. I am saying this to to because you are one of the best and ideal teacher for me. please make it's very humble request.

[@physicsgalaxyworld]

noted

[@nitianaryan314]

@@physicsgalaxyworld yes sir please make

[@SanjeetKumar-xx2zu]

Sir, question no. 2 ka answer (ml^2/12 +mr^2/4) na hokar (ml^2/3+mr^2/4) hoga kya

[@userismad001]

Sir i just wanted to thank you from the bottom of my heart.. I've been following your channel and concept videos ...those 8-9 years old videos are amazingly relevant till this day and have helped me thoroughly learn the chapters in my preparation for BOARDS and NEET... I'm appearing for class 12 boards exam and NEET in 2021 and I'm confident that your videos will definitely help me achieve a higher score..

[@AMAR-pc6ht]

U will score 180/180 , my wishes is with u...

[@userismad001]

@@AMAR-pc6ht thank you so much dear stranger for such encouraging words.... That means a lot to me... I wish you a veryyyyyy good life too😊☺💜

[@AMAR-pc6ht]

@@userismad001 by the way for ur kind info I am going to join IIT Roorkee, this year... I am here becoz of love for physics and ashish sir... I can't forget him even after selection..

[@userismad001]

@@AMAR-pc6ht oh really??? That's so great.. I'm really happy for you.. I really wish you pull through the years in IIT wonderfully and become a famous engineer. All the best, just believe in yourself and I hope you get amazing mentors like Ashish Sir in IIT .. 🍀🤞💜

[@AMAR-pc6ht]

@@userismad001 yes it's real, I got highest mark in physics becoz of ashish sir only, I want to meet him, hope u too get ur dream college...

[@karishmasharma4294]

Why this legend not known by me in this years

[@user-um8bf9re1m]

It is to the sir who is reading my comment Sir who are you, you are not ashish arora sir but you gave every answers to our questions

[@supersmash0990]

Wow sir.... My teacher also taught me this topic in same manner

[@sushiltarafdar4758]

Sir thank you for your selfless service for us. Hey GOD I am very much blessed that I am able to connect with such a physicist . Thank you so much sir ☺️🙏🙏🙏🙏🙏🙏

[@dhairya7323]

Maza aagaya sir🙏

[@Aditya-bl5xp]

Congratulations legend for hitting 1M

[@SumanSharma-dx1fn]

Sir please make one vedio for some study strategies for class 11 students for better preparation.🙇🙇

[@AT-ly7ud]

Sir your all video are helpful. Every video there is always something new which I have learned for the first time 🙏🙏 thank you for your hard work🙇💯😀

[@sumitdebnath4311]

Sir agar ham plane COM ke along na lekar kisi aur inequal portion cut karein toh MOI pe kya affect hoga?

[@sameermishra5836]

Thanks sir , u r awesome!!

[@rohanrawat3264]

Sir u r reallya legend 🙏🙏🙏

[@garuda5742]

SIR PLEASE BRING A VIDEO ON CALCULATION OF MOMENT OF INERTIA OF A BODY WITH CAVITY

[@satinathghosh4724]

Sir when will the NCERT notes be coming? And my request is that to make an another playlist for NCERT notes, which will be very much helpful for us.

[@pratyush62YT]

Wow I can understand everything 🐱

[@ayushthelegend]

Sir, I've never got a reply to my questions- •Where are booster classes? •Should I first try illustrations you give or learn directly from you?

[@neminsheth8909]

Great teaching, and a big pressure of this chp has been released thank you Sir and everyone behind this great platform

[@gamerzgang3264]

Everyone is gangsta......until ashish arrives with his pogeee

[@Getsetrelax-q2e]

Sir using the animation and explanation which smart board people can't

[@chakradhar5884]

Very amazing lecture sir

[@praveshgupta8263]

sir , this is very good way to learn faster and effective in Physics . thanks a lot Can we also bring it to ALLEN.?

[@spgaming1922]

Sir can we calculate the moment of interia of rod ml^2/12 without using integration if yes than how please tell me

[@helodarknessmyolFrend]

calculate for half of the rod and multiply by 2

[@shubhamku044]

Sir you are great

[@itsconfidential9192]

sir in the first question the answer shd be (5ML^2)/24

[@prabhatgautam3017]

Nice Explanation Sir...... Thank You..

[@narayanverma2668]

07:09 me bhi m same rahega ya half hoga

[@random_akki]

Woww sir thanks for the animation 😍

[@bhudeokumar9992]

True legend l wivery thankful to God if l can become 1% of you

[@HARSHSINGH-kg6gc]

Watched 1st video by pg and just loved it the concept of that gini and better visualization, changing of slides with words are just awesome 😮🤘🤘🤘✌✌can't like it more than one time i would have liked it 1000 times

[@shashwatagarwal7067]

Sir please do reply, sir i got affected from corona and my past few weeks got wasted now how can i recover that time lost. I am preparing for jee 2021

[@physicsgalaxyworld]

stay tuned

[@YashrajGadiya]

Lol 😂😂

[@ahmadshaikh7494]

Thank you very much sir

[@kamalyaduvanshi121]

pogi is genius 😊😊😊😎

[@kavyanjaligavate449]

I ave no words sir..,i was worring ki mujhe yay nahi aate... i was deriving everthing 😅... now feels very esy...thank you !!!

[@sohambhatia7430]

Thank you sir for these tricks.

[@tsivachidambarampillai1131]

sir kise angle pe object ho tab kaise karna hai please batadijiye

[@Yadavabhi_21]

Sir any batch for jee2021 Hindi medium

[@Kutumbka6257]

Thanku sir i have seen your all checklist and they help me a lot Thanku sir god bless you sir🙇‍♂️🙇‍♂️🙇‍♂️🙇‍♂️🙇‍♂️

[@jhumapaldas9515]

Sir please make a video of three important points which you discussed in your jee advanced strategy video.

[@potu6534]

SIR THANK YOU VERY MUCH 😊😊😊😊😊😊😊

[@shreyanshdhawan6557]

sir plz tell why tension is negative in vertical circular motion when angle is greater than 90°

[@taneshdevhare8344]

Thankx a lot sir. Hats off for your hardwork sir..

[@ayushprakash5869]

Sir pl. When it convenient to use energy method instead of force method in SHM To calculate angular frequency.

[@satyamrahangdale3389]

Mind blowing!!

[@muzankibutsuji5572]

Video chaalu hone ke pehle hi 30 comments wow

[@arpittiwari_15]

Many people on KZbin has great knowledge but they don't share knowledge For students .

[@movie_shorts_07]

Please explain Question no 3

[@rinkeshprajapati3181]

In case of diagonally separated cuboide the mass will be M/2 ??

[@madhumitabanerjee9544]

sir, answer of second question is wrong i guess , it should be (MR^2)/4 + (ML^2)/3 . am i correct sir? sir, i solved it using integration. how to use the trick u explained?

[@Invincible393]

Why is this ...1/12 ..🤔🤔 is its the value of infinty...

[@mehulshrivastava2207]

Abbe Einstein, faltu logic mat Laga

[@KritikaVerma-uy8ke]

Jab cuboid ko half Kiya to uske moment of inertia mei mass half hua ,also,length of cuboid bhi to half hogi Uski vjhe se bhi moment of inertia mei change ayega ?

[@shreyanshpatel0707]

5:04 yeh rod k liye kyu nhi valid hao??

[@ameypatil346]

Sir aapne kaha ki hum body identical part break Kare to moi constant rehta he mean uska magnitude bhi constant rehata he kya? Moi1=moi2

[@AlanWalker-7142]

Shukar hai rod sir ko nahi lagi 😲😲

[@AMAR-pc6ht]

😅😅 hm lagne he nahi denge... 😋

[@anant_vyas]

Wahh bete wahhh😂

[@lakshmiloganathan1184]

Sir is it necessary to read to NCERT book,if we read and make short notes of Physics galaxy books?

[@lakshyabhagwat]

rotation never been so amazing

[@thippareddy6609]

Sir please suggest us reversion method of chemistry plzz sir🙏🙏🙏

[@nitish0075]

Sir how you handle online and offline students altogether..?

[@physicsgalaxyworld]

Students consistent love and affection is the source of energy of Ashish Sir.

[@nandanraj923]

sir pls make a video on calorimetory part...and once again thanks to u for today's

[@VinodKumar-tp1tw]

Sir your teaching was mind blowing sir..... We wish more videos and ur blessings to us sir to crack iit jee....🙏🙏🙏 Thank you 🌹🌹🌹so much for your help sir 🙏🙏🙏🙏🙏🙏 We are always thankful to you sir Thank you...thank you.....thankyou.... Thank you.... So much sir... 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

[@physicsgalaxyworld]

Thanks for your good words, Ashish sir's blessings are always with you. Wish you all the best!

[@aimvsdream]

You are in which college?

[@VinodKumar-tp1tw]

@@aimvsdream JNTUA

[@aaryamangupta]

Thank you pogi 🗣️🗣️ 🔥

[@Study-ke6nu]

Sir first question me I ko " I1cos30 +I2sin30 " me break karege kya ?