Constraint Relation Trick (NLM) | Pulley Problems in Physics | JEE Main, NEET, AIIMS

[@uttkarshsachan4063]

Thank you for this video.I was facing difficulty in solving multiple pulley problems and this video cleared all my doubts.Thanks once again.

[@sachinranaiitb]

+SACHAN UTTKARSH welcome bro

[@sachinranaiitb]

+SACHAN UTTKARSH solve the ques in hcv today regarding this

[@uttkarshsachan4063]

Best JEE and PMT Preparation ok I will do it

[@gurmeetkundu505]

thanku sir

[@jobinv6792]

Thank u so much bhayya

[@salonidhotre8789]

We were taught by the displacement.. the" x" , " y" method and I never got it right! This is truly Amazing! Thanks a lot!

[@johnathanrafael188]

GOSSHHHHHH, MAN, FINALLY I LEARNED THIS! THANKS (AND BLESS) FROM BRAZIL

[@nagesh6130]

@@adityatiwari8121 😂😂😂😂😂🤣🤣🤣🤣😅😆😆😆😆

[@rithwik1089]

it was an amazing technique.... thank u for being so generous and telling us this trick..... loved it ....hope we will get more such tricks from u in near future

[@clashware4532]

The main concept behind this is that sigma (power for internal forces) is zero. Power = T.v . Solve it by Sachin's method After that you will get v and if you differentiate wrt time u will get the acceleration..

[@udayansingh6788]

Thank you so much bhaiya.... I had been struggling with these questions for like past 2-3 weeks and now all of a sudden they seem to be so easy that I am able to solve these in under 2 minutes.

[@Jeeprep-dm3pq]

Creative approach! The world needs more of people who think like you.

[@joyfinny8949]

sachin bhaiya, pls make a video on isomerism in coordination compounds. its always confuses me. i'm preparing for jee adv 2024 and i watch your oc lectures, they are just more than enough to solve msc and jee adv

[@sweta8058]

Two cars A and B are moving towards each other on a straight road, with speed 50m/s and 100m/s respectively. A mosquito moving with constant speed of 150m/s, starts after biting driver of car S and moves towards driver of car B bites him and comes back of car A, bites him and again continues moving to and fro and biting them. Find distance travelled by mosquito till the cars collide, if the initial seperation between them is 1 KM .

[@ritikaroy1639]

No one complimented his hand writing 😍😍 love it

[@Manish.Chouhan]

FROM ALLEN KOTA REALLY 🔥🔥🔥🔥HELPFUL AS I ALWAYS USE TO GET CONFUSE IN THESE TYPES OF Questions🔥🔥🔥🔥🔥

[@Calisthenoob]

amazing bhai! complete clarity achieved in the concept!

[@sachinranaiitb]

+iL3G4CY thanx bro...

[@MGcric7]

bestest video for constraint relations

[@mahimadavi9103]

I was taught my another method which never worked for me but this one really best and useful in question solving 👍👍👍

[@melancholicdreamer1189]

OMG THANK YOU SO MUCH SIR! I have a very important physics exam tmrw and thanks to this video all my doubts are solved! You are a life saviour man! Keep up the good work. :D

[@leopard8296]

Ye jugaad use krta hoon tests mein... Although conceptually normal relation se jaata hoon bhaiya. You are the only one whom I have found to use this trick... Except for the legendary Amit Gupta sir who taught me the same. Really appreciate your hardwork bhaiyaa. You are a real hero. 😊😊Thanks

[@Ghost_71003]

Bro ur awesome this trick Is truly amazing a problem which takes 5 mins to think and do using this it is taking just 30s

[@susantaroychowdhury2641]

Thank u so much for the video....U made the Pulley Problems sooooooooo easy..... Thank u so much...U r indeed the best

[@nishantkumar4342]

Bro ur method is great.. But can u explain how summation of T.a is 0. Please

[@judesonvchulliikkattu7935]

Net workdone by pulley = sigma t.s=0 Differentiate it twice for t.a

[@hattorikanzo2793]

T v

[@gajanandgena]

Thank you very much bhaiya , I was having doubt in constraint relation and you cleared it very well. Thank you very very much.

[@VandanaSharma-hm4ty]

Sir just wanted to add something If the string is not roatating that means the string is not changing its position and is only going up and down on the pulley then you can use the formula £T.a but if the string is covering a distance say x in horizontal direction then this formula is not applicable then for acceleration you will have to differentiate the formula £T.v

[@abhisheksarrafvevo804]

Nice video for whom who has not good concept .Thank you

[@ankitjhaaj478]

Your voice hit my mind so hard that even me can understand the concept so well 🙏🙏 thank you for continuous support

[@jyotiradityapurohit3025]

It was very confusing to solve such problems eairliar but now with this trick it has become much easier to solve such questions.thanks sir

[@tksarunachalam7217]

U r the best teacher I have seen ..Soon u all achieve it dreams

[@arpitaroy867]

Thanks bro.. excellent trick .....very helpful ..if u can come up with a few more of them then u will be a mega star in the world of teaching

[@KeepLearning--inderjeetsingh]

Concept ache clear kar rahe ho... Upload more videos

[@amitchaudhary7679]

Sir your method is best now my all problems are solving

[@debanshdash9312]

U r the real saviour bro... previously I was really confused but after watching this video, I'm able to solve each and every question. Thanks a lot!

[@torresfan1143]

Heck even writing the Lagrangian for the system wouldn't throw these relations that fast . Dope stuff mate , thanks

[@pranayjagtap5295]

You teach better than coaching teachers😀😉

[@jameelahamed6615]

Bro you saved our lives, God bless you

[@keepingupwithchauhan]

You r awesoe!! I never knew these types of problems could be so easy

[@monikasultana4108]

it helped me a lot earlier i was soo confused with the old method but ths method is awsome...thnks sir...

[@sabujmaity5427]

Bhaiya I m grt fan and student of yours...my organic is getting better every day for u i am regular at Unacademy just want to say if u could plz tell us some more on physics it would be grt help the help u r providing is too much if u can plz thanks for being a such an humble and grt teacher !

[@sachinranaiitb]

+Sabuj Maity my physics is not that good as you people think.

[@sabujmaity5427]

Sachin Rana - IIT Bombay Oh But really thanks for your help will be thankful forever

[@riteshdubey6838]

Thank you bhaiya isne ekdam modd lift kar diya...sab jagah khoja kahi nahi mil rha tha tab ek dost ne aapna channel ka naam bola thank you so much ❤️❤️❤️

[@SAURABHKUMAR-dz5dt]

Beo itna acha to mere sir ne bhi anhi bataya tha. You can do batter at this platform. Congratulations for future 1m subs

[@AbhishekKumarSingh1999]

thanks bhai best explained trick until now...helped me a lot

[@joydeepmukherjee6046]

Your method is really very helpful sir..especially as i didnt really understand the differentiation method..Please keep making unique videos like this....

[@sunagrao4980]

Works every time!!! Ty so much, saved my life in exam!!

[@gopalprasad6823]

Sir thanks..... Your trick was very useful you are my inspiration IIT Bombay 😇😇😇

[@nitinverma5284]

Good. This method is also used by Byjus But now I get clear explanation.

[@udeshkumar123]

Dear sir will you please give a trick on circuit problem ?

[@shivmangalprasad3503]

Ugh, this is the virtual work method mentioned in Feynman lectures on physics. It doesn't work everywhere. Sometimes we have to use the constraint relations.

[@vatsalgoyal4711]

It doesn't work when anglr between T and a is changing

[@2mat012]

@@vatsalgoyal4711 Are you sure? Also, are there any more cases where it doesn't work?

[@vatsalgoyal4711]

@@2mat012 yes 100% sure

[@ranjitkalita3734]

Thank you sir your trick is really very useful, But will it work for all constrain motion problems?

[@luckynath6188]

Bhaiya what a trick i was always facing difficuty in it but now it's just a cakewalk for me😊😊

[@gayathriharidas369]

Excellent trick sir.... Thank u for such a nice trick...👍👍👍👌👌👌

[@Nandini-Maharaj]

Really helpful! Hope you toppers keep helping us like this!😁

[@adityads1339]

Thanks a lot! It works amazingly! But i would like to know 2 things: 1. Why does this technique work? 2. Is this technique universal? I mean can it be used in every possible situation? One more thing i noticed is that, even if some pulley system is not accelerating, but rather moves with a constant velocity, we can apply the same technique by doing Sigma T•V=0, and find the velocity relations.

[@RashidKhan-hh5eq]

I have the proff of it which comes from work power energy -as work done by net tension in a system is zero and on diff them. We get your method,,,,

[@mayurpatel2506]

You explained so nice that all complex pully problems had become easy Thanks for the video

[@chaitanyamathur8757]

Thank you sooo much!! Our teacher had explained us about this method but it didn't fit in too well, but you explained really well thanks!!

[@sachinranaiitb]

Welcome.

[@letsplat__]

Great bhaiya, it's so simple and easy.

[@prashantbharadwaj5934]

What are those dislikes for... So well done! 👍 ✅

[@Anonymous-rx8gp]

One question keeps bugging me. When u r attaching all the pullies to the wall then how are they gonna be in motion? The summation is 0 only because the the pullies aren't moving. The difference is done to get a result of DX/DT which is equal to 'v'. Let's say the main pulley has a velocity of 'v' or acceleration of 'a'. Then the result would be Length of the pulley string is always constant V(pulley)=(v1+v2)/2 a(pulley)=(a1+a2)/2

[@VandanaSharma-hm4ty]

@ohyeah ohyeah dude the string is open from one end and you have to pull the string so that it causes some initial tension and then the blocks with the mass m can move

[@rajgupta2727]

very different method bhaiya...thanx for sharing

[@dsarada8831]

Thank you brother😄.... you made it easy to solve pulley problems.. I was struggling with them so far..

[@VijayKumar-zw6fy]

thankuuuuuuuuu so much .I was facing a lot of problem in this concept.👍👍☺

[@khushigupta2976]

yes sir ... i had given upon string constraint until i saw your vid thankyou so much sir!

[@amoghbajpai4145]

Please do a video of using this in case of a non inertial frame as well.

[@pragadeeshkarthikeyan4308]

thank u bro support from Tamil nadu

[@sabinshrestha2237]

May br the best video on combination of pulley😊, i hv saved it twice.

[@amazonindia9264]

Please give such tricks through your videos on river man and rain man problems (mainly in inclined plane).. I and many of my friends too have problems regarding solving the questions based on this particular topic.. So, please.. Now, a days I got fear from those problems..

[@dominikudovicic3573]

Tnx man, I had troubles with this kind of problems and your trick helped a lot :D

[@genericarnav9449]

I think this is called the principle of virtual work. Somebody clarify..... Amazing videos. Thanks!

[@sonalipatil2565]

It really helped me a lot Sachin bro.... Please include previous year jee questions which can be solved easily by using ur tricks....

[@ayushtripathy4834]

It is internal work theorum.....

[@chsrinivas6770]

Yeah

[@venomarpitsingh7000]

Same can be done by displacement i.e., £T.x=0 internal work done by the string is ZERO

[@_vinayak_kumar_]

Thanks a ton brother!!😊😊 Able to solve now.

[@keshavtyagi1928]

awesome man cleared all my doubts....

[@diptimishra7757]

Impressive..... fantastic..amazing...thaaank uuuuu sooo much

[@haqdeenislamproduction3157]

Great video sachin bhaiya.

[@saurabhjain4175]

Thank you soo much for such Gr8 trick!!!

[@puneetyadav3066]

This is really amazing.I never thought that this would make it so easy!!!!! THANKS

[@shashwatchamoli7221]

My god This has to be one of the best tricks i have ever seen Thank you so much

[@chiragbhutada2791]

YOUR VIDEO ON WAS TOTALLY AMAZING .NOW ALL MY DOUBTS ARE CLEARED .SIR PLZ ULSO UPLOAD CONSTRAIN IN SPRING.IT WOULD BE VERY HELPFUL

[@sachinranaiitb]

+Chirag Bhutada thanks.

[@utkarshagiwal7457]

How to solve problems where acc respective to string is given of a particular block. Please show by taking any of your example

[@debroopmajumder7206]

Sir...Does this method express the direction of acceleration in its relation because the last sum solved involves direction in its relation?

[@sz2152]

excellent job done bro....really helpful

[@maitrimahak]

Was very good and helpful ....thanks

[@asimkumargupta1290]

If two bodies are attached to same pulley one moving upward another downward with same acceleration will T.a be considered for both masses or for one mass?? Pls reply sir

[@krishnasivakumar2479]

Thank you very much! It just works like magic!

[@kuldeep1633]

Please make more trick videos which will be useful in IIT Jee exam.

[@satishkumar9955]

is it applicable to variable tension with multiple pulley problems?

[@insajderpapaj4650]

Fantastic! Could you explain where that dot product condition comes from?

[@vrsoback]

Love it! To Which kinds of questions is this applicable?

[@sachinranaiitb]

+Posittron as far as i remember HCV(part-1) NLM and then in the subjective exercises many questions are on it

[@guhaaditya9226]

Bhaiya your videos are just amazing. They are really helpful. If possible please make a video on VOLUMETRIC ANALYSIS.

[@tejasmd8143]

How do we realize the acceleration we assumed was in the wrong direction? Your video helped a lot anyway..Thanx!

[@skusaid8512]

If value comes out to be negative.

[@sujatha2300]

Thank you so much brother...it really helped me a lot...one doubt bro.. Does this apply to each and every sum related to pulleys? can you prove those equations?

[@sumanthgowd5017]

Hello bro I am a dropper bro for 2022 ❤️ I am feeling difficulty in physics what can I do plz reply bro🙏🙏🙏🙏❤️

[@shivangisingh6572]

thanks for the video...really helped... btw i was looking for wedge constraint...so if u hv some tricks related to that plz share...

[@drmgmfarooqui]

amazing bhai. Can u solve this question? Q. If LCM(x,y)=2744, LCM(y,z)=1372, LCM(z,x)=2744, then total number of ordered triplets (x,y,z)=n sum of digits of n=? [Integer type question].....

[@vedslofi6254]

Really your experience, are very very help ful to us😊😊

[@avanishpatil352]

Sir in the send example u took... U could have taken a2 in downward direction also right??? How do you predict the direction??

[@AyushKumar-nl9yd]

Avanish Patil aree bro dekh apan ne ek koi bhi side me accerelation maan liya ok now after solving required constraints you will se that if acc will be +ve then your prediction is correct and if your prediction is wrong then acc will come with neg sign. Hope it helps !!!!

[@thefinalsceneismissinggrea6172]

u can use a similar method for solving wedge constraints.the total work done by internal normal force is zero.

[@seemasrivastava7947]

Hello.. bhaiya i just want to ask that can u teach the differenent types of variations in young's double slit experiment ?? Like what happens when it is emerged in water or other cases like this ... Please make a video on it

[@himangshusharma258]

Keep posting tricks videos for every topic u know. It's really helpful.

[@hariommanjhuindia627]

Sir vo bahut sari pully vala question bahut kam sir karate hai I see you and one another is only utkarsh classes saurabh sir best work love you

[@Vishal-rfx]

can you please give a concept behind the formulae?

[@sachinranaiitb]

+Vishal RFX which one are talking about?

[@Vishal-rfx]

Best JEE and PMT Preparation that new method

[@sachinranaiitb]

+Vishal RFX the T.a=0?

[@Vishal-rfx]

Best JEE and PMT Preparation yes what is the concept behind it

[@sachinranaiitb]

+Vishal RFX oh i understood

[@sakshisen2168]

Thank u so much bhai It helped me a lot Thank u😊😊