16 hours of hardwork spread over 9 days , and finally , I was satisfied with the output✌️ I wanted on this 15 min video ( premier today ) . Lots of slides re-written , cancelled , replaced , choice of practice problems changed multiple times😉 . This was to ensure not only to provide the solution but also to cover the complete concept and bust wrong concepts commonly used in such problems involving Bernoulli's equation . Let's see who was wrong this time , JEE or coaching materials or students 🤷in this step by step explanation of all concepts. I know , what I believe is good need not be liked by others , but this time , I am actually proud🙋 of the honest effort that went into the video irrespective of the outcome . You may revise some of the previous videos in fluid dynamics playlist before this video premieres 👇 and don't forget to "Apply some pressure on the like button😁 " when the video is out. Lots of love and enjoy the learning 🙂❤️ 18_FLUID DYNAMICS: th-cam.com/play/PLtzNDt-x8_02gk5bit0v8mt2uvOyl-EyZ.html
We really appreciate your work sir. Success takes time but when the time comes it will blow everything in past and will put you on that much height so the height only solves all the problems... when your channel will grow you will get a lot of views on the videos which you have done earlier so keep going we are with you always
Yeah it'll take time for the crowd to shift from those channels which claim to be for " jee adv " to these channels which truely are for that. But when it does it will blow up and all of this hardship will be worth it.
sir i have seen no one explaining jee adv pyqs with this deep insight and conceptual clarity...u not only do post martem of the problem but make us learn at which level of understanding we need to solve such questions and also give future possible situations on similar questions...and thats why jee adv pyq series is my favourite...love u so much sir...😄
Sir thank you from bottom of my heart. These conceptual questions of playlist are really helping me to understand the topics really well. Thank you very much sir . I really appreciate the amount of hard work you are doing for making problems easy through pictures and other methods and it is really effective. Sir I know you are busy but please make these types of videos when you are free. I don’t know you will read or not but sir your analysis problems always makes my day and I feel that I really understand the topics. I’m jee 2022 aspirant. Thank you sir again
JEE Roast series continue....only janardan sir have courage to say that jee had made mistake with proper explanation and logic. Thank you very much sir ❤️ for all the knowledge what you are imparting to us.
I remember when I saw this question in paper 2 while I was in examination center first I got panicked then I remembered that during a storm when wind blows at high velocity the pressure under the roof and above the roof is different. I tried to use Bernoulli's equation but because I have panicked earlier I did the same mistake that 8/9 one and I was never able to reach the answer in time. I can remember what happened to me exactly with every question. Thanks a lot sir you make me more confident with every video of yours. I hope I will be able to perform in JEE ADVANCED 2021. Thank You again.
Sir, to be honest I haven't even reached till fluid mechanics however I still watched this video 'cause I just love your explanation.👍👍👌🔥🔥 Too good...!!!
16:48 the answer should be D: as at point 1 it is a rotational flow Then this question can be converted into ur previous video question where b= l and a= l/2 .The fluid is filled in between the two Apllying previous results we get tap speed flow just outside the tube wrt tube as √3wl/2 ie option A. Answers :A and D
JEE wale be like: Make a paper so that this guy can't roast it.. izzat ka sawal hai IIT ke liye 😎😂 (I know this wasn't a roast video but mostly sir roasts JEE badly, & we very much love those videos)
@@PHYSICSSIRJEE Sir plz do take the previous practice problems in decreasing order of difficulty sir 🙏🙏🙏 ..... Although most of them are well disscussed in cmnt section and discord
@@PHYSICSSIRJEE Thank you so much for your reply sir. Your videos are really providing a great aid in my prep🙏🙏. The practice problem discussed in this was solved by me in the paper but I was unaware of that conceptual error I made there. Thanks again for this video 😊😊😊😊😊😊
Sir i like ur effort of providing all these tough question free in you tube for jee asprirants . Really i like your passion sir🙏🙏💜.I hope you will continue the you tube channel. And we will definitely support you sir
7:08, sir i had already commented on that video a long time ago, regarding some key point which was missing in that video, i think if you would have followed that comment, it would have saved you some time while preparing for this video. Besides, i was also expecting that you would discuss the applicability of continuity eq.n in the different reference frames (ground and train). I hope you should give a thought on this, it will enrich you. otherwise 👍👍👍
Continuity equation is based on mass conservation . Here it takes an easy form w.r.t train . I had to take care of length of the video , so had to skip that in ground frame. We will surely address it in a future video
sir at 16:34 cant we do like F=Ro*A*v^2 and also Fmax/t*(side length)= shear stress and equate them....by this am getting answer as B and C.... thank u soo mch for this video...almost forgot about rotational and irrotational flow
Sir please leave the answers to all the practice problems in the first comment. That way we can atleast confirm our answers, and check if we understood the concept. This is specially helpful while refering past videos of the channel, for you won't be able to confirm answer for them now
In the original problem of JEE, we could relate the velocities of air at far away point and at nearby point(in train frame) using equation of continuity. How can we get the velocity of air(in car frame) at nearby point in practice problem 1?
17:06 sir i am getting answer as AD, which i have checked from the comment section is the correct answer. But I am not sure whether my approach is correct or not. I solved this question by applying Bernoulli's equation in frame rotating about the axis, using the approach you shared in one of your other videos. the equation which I made was *P0-(rho)w^2(L/2)^2/2=P0-(rho)w^2L^2/2+ (rho)V^2/2* can you please confirm sir if this equation is correct? I am confused because my teacher while teaching this topic gave us a similar question in which he put pressure at point P1 and P2 to be different, and applied Bernoulli's equation, and he calculated the pressure difference by equating it to centripetal force on center of mass. Isn't this approach wrong even though it gives correct answer?? shouldn't the pressures at 1 and 2 be same as they are both open to atmosphere?
Sir Can you please explain why flow is steady wrt submarine ( in the first example) when submarine attack a particular pt. then will not it's speed change wrt submarine
Then even if the speed changes it's fine because at different time particle will not be at the same place, it will move and take different area of cross section
12 :50 sir, if we consider another point D beneath the car ,then we can’t apply Bernoulli between point B and point D ,as velocities of these points will be different ,so it is a rotational flow ,now consider two points in front of car E and F which are more or less identical ,then a streamline goes from E to B (top of car) and another streamline goes from F to D(beneath the car ) ,now I can apply Bernoulli between E and B and also between F and D ,as they are on same streamline ,as point E and F are identical ,then indirectly we have applied Bernoulli between B and D ,which we shouldn’t have applied bcoz it is a rotational flow ,then sir how are we getting the same result as if fluid was irrotational,please help
Sir Another Amazingg video!!!🤩🤩. But I have a very silly doubt in Practice Problem-1😬.. If we consider the FBD of the glass, we will have ∆P×(Projected area)=m(a).. Since the car is moving with a constant velocity a=0. Hence Pout=Pin.. But there is something wrong here. Can you please tell my mistake sir
Sir to find pressure at the stagnation point (2) in the STANDARD Example You Took, why p2=1/2(rho)v1^2+(rho)gh why is it not p2=1/2(rho)v1^2+(rho)gh+p0 What I mean is why don't we add atmospheric pressure in the RHS of the final expression? So my answer is coming (Po+518)kPa I don't think the Po terms will get cancelled both the sides bcoz P1=Po+(rho(gh)) and pressure at point 2 is asked ,,,, which should be the net pressure on point 2
@@PHYSICSSIRJEE Sir I actually went through the video thoroughly and I understood your point. I also read the unsteady flow portion from the Munson Rothmeyer book as well. It stated that solving the unsteady flow problem was out of the book’s scope. Hence I asked whether you could how to solve without changing the frame of reference to the submarine. Also thank you sir replying on an old video
Already answered below in comments . Density of air is very small , so pgh term for the dimensions of the train is negligible in comparison to other two terms of Bernoulli's equation
Sir, in the first AITS problem could you please explain the term-- (sigma)x(1.6)t? What is 1.6?? And Sir why is the shearing strength given, if a longitudinal force is going to act on the window..Also does shearing strength mean it is the shear modulus? Thank you for this wonderful video SIR!!
Well i solved the problem myself, but I still feel there is something missing in my logic.. also i didn't get what the pressure inside the train had to do with this as i applied the Bernoulli's equation b/w the front of the train and sides.. not completely satisfied but eagerly waiting for the premiere to unfold this one 😋
@@amiyancandol4499 i am a JEE2022 aspirant actually so was asking how was it for you...ive heard you cleared kvpy sx so...also i tried to solve few questions from the paper...i took up maths paper 2 first and tried Q.3 and Q.4 first...they seemed easy...i know there is a lot of difference solving at home and solving during the actual exam....but how was it for you tho?
@harshit gupta kvpy tumlog ka level hi alag he ..... tumhare jaisa koi to iss time pr online bhi nhi he 😂😂😂.... msg krre to ignore mardeta..... Thats why
sir i am really anxious I worked hard over the past 2 yrs and im sure i can do well in all levels of paper other than 2020. In the 2020 paper i was unfamiliar with so many concepts. What can I do about this sir now that only one month is left?
Sir why did you not account for the height factor while applying bernoulli qequation or you assumed that points 1 and 2 are at same straight line approximately
Height or dimensions of train are not mentioned in problem, hence not considered. Practically also , pgh term will be very small in comparison to 1/2pv^2 for usual speeds of train ( p = density of air )
Can we say that the fluid is not the same. Hence B.T can not be applied between the two mentioned points , one in the above air and one inside the car?
Sir in my opinion they should also mention that speed of 🚆 is high because there is difference in average height between two sections of fluids which leads to ( density) ×g×∆h . Obviously if speed is high enough this term becomes humble against (density) v^2 like terms
@@anubhavsrivastava4906 yeah , usually trains do travel at high speeds anyways. Also when dimensions of train is not mentioned , it's a hint to ignore h
sir the solutions of practice problem 2 you didnt give please give that sir ......and sir one more thing when will the video solution of all the practice problems come ..im waiting since so long please help
It will loose contact at particular height h only . Where h/H is fixed fraction . H is initial height . I don't want to spoil the question by revealing exact answer here 🙂
I didn't mean it . It was mentioned in the question. It's not a result of Bernoulli's equation. It might be maintained by some ventilator or air conditioner inside
Sir I have a doubt U said in your Bernoulli equation video that we can't apply Bernoulli equation wrt a moving frame since surface also does work there So why are we applying it here wrt train that is moving and how is that work ignored?
Sir at first I wasn't able to recall the concepts of Bernoulli When I go through the question From where I can get these similar type of problems Since I haven't solved this type of problem yet Then how will be solving at the time of my JEE advance I have solved hcv and dc Pandey but still not able to solve it
16 hours of hardwork spread over 9 days , and finally , I was satisfied with the output✌️ I wanted on this 15 min video ( premier today ) . Lots of slides re-written , cancelled , replaced , choice of practice problems changed multiple times😉 . This was to ensure not only to provide the solution but also to cover the complete concept and bust wrong concepts commonly used in such problems involving Bernoulli's equation . Let's see who was wrong this time , JEE or coaching materials or students 🤷in this step by step explanation of all concepts.
I know , what I believe is good need not be liked by others , but this time , I am actually proud🙋 of the honest effort that went into the video irrespective of the outcome .
You may revise some of the previous videos in fluid dynamics playlist before this video premieres 👇 and don't forget to "Apply some pressure on the like button😁 " when the video is out.
Lots of love and enjoy the learning 🙂❤️
18_FLUID DYNAMICS: th-cam.com/play/PLtzNDt-x8_02gk5bit0v8mt2uvOyl-EyZ.html
Sir Ur efforts are priceless.
@@krishsharma162 Thank you Bernoulli JEE 🙌🙋😉
We really appreciate your work sir. Success takes time but when the time comes it will blow everything in past and will put you on that much height so the height only solves all the problems... when your channel will grow you will get a lot of views on the videos which you have done earlier so keep going we are with you always
Yeah it'll take time for the crowd to shift from those channels which claim to be for " jee adv " to these channels which truely are for that. But when it does it will blow up and all of this hardship will be worth it.
The link to the playlist doesn't work sir
sir i have seen no one explaining jee adv pyqs with this deep insight and conceptual clarity...u not only do post martem of the problem but make us learn at which level of understanding we need to solve such questions and also give future possible situations on similar questions...and thats why jee adv pyq series is my favourite...love u so much sir...😄
Sir the answer is 9 and I have applied a pressure to like this video.
Thank you sir for your hardwork.
Who have liked the video without seeing it keep it up sir .
I am very happy that i came across this physics channel. Its pure gold.
Sir thank you from bottom of my heart. These conceptual questions of playlist are really helping me to understand the topics really well. Thank you very much sir . I really appreciate the amount of hard work you are doing for making problems easy through pictures and other methods and it is really effective. Sir I know you are busy but please make these types of videos when you are free. I don’t know you will read or not but sir your analysis problems always makes my day and I feel that I really understand the topics. I’m jee 2022 aspirant. Thank you sir again
I try to read and reply to all relevant comments 🙂
JEE Roast series continue....only janardan sir have courage to say that jee had made mistake with proper explanation and logic. Thank you very much sir ❤️ for all the knowledge what you are imparting to us.
A committed teacher is the best gift you could give a student.. Keep up with the great work!
It is the quality of one's convictions that determines success not the no. of followers
16:53 we could use Bernoulli in the rotating frame but we need to use the potential energy due to pseudo force . My answer is AD
I remember when I saw this question in paper 2 while I was in examination center first I got panicked then I remembered that during a storm when wind blows at high velocity the pressure under the roof and above the roof is different. I tried to use Bernoulli's equation but because I have panicked earlier I did the same mistake that 8/9 one and I was never able to reach the answer in time. I can remember what happened to me exactly with every question.
Thanks a lot sir you make me more confident with every video of yours.
I hope I will be able to perform in JEE ADVANCED 2021.
Thank You again.
Trust in your hardwork and honest preparation , you will do well 🙂👍🏼
@@PHYSICSSIRJEE Thank You Sir 🙏
@@shashwatdwivedi8184 are you a dropper?
@@riddheshpatil7598 Of course
@@riddheshpatil7598 Yes
Sir, to be honest I haven't even reached till fluid mechanics however I still watched this video 'cause I just love your explanation.👍👍👌🔥🔥
Too good...!!!
Thankyou sir for clearing those miss conception.. now all is cleared.. sir in 17:02 mins the qusn from AITS. I m getting the ans as A and D
Correct 👍🏼🙂
It's ironic that the mind of literally all the t JEE Advanced toppers go 'skip' right after seeing a problem of this magnitude.
16:12
Can't apply Bernoulli as the streamlines dont even exist in the car
True 🙌
Keep up Bro. OP Efforts. Nobody on This Earth Explains these Problems like these.
SIR PLEASE BRING SOME MORE GOOD QUESTIONS FOR ADVANCE 2021 CONCEPT CLEARING .
16:48 the answer should be
D: as at point 1 it is a rotational flow
Then this question can be converted into ur previous video question where b= l and a= l/2 .The fluid is filled in between the two
Apllying previous results we get tap speed flow just outside the tube wrt tube as √3wl/2 ie option A.
Answers :A and D
@Physics Sir JEE please Reply sir.
@@abhishirshsachan8694 correct 👍🏼
Tysm this level of deep application really cleared a lot of doubts in my head ty sir
Was waiting for video on this problem from a long time , Thank you very much sir 🙏🙏 !!
Sir pls take the piston-vertical cylinder problem of paper 2(bonus) next in this series.
Very beautifully explained thank you sir and hats off to your hardwork sir ans some questions on quora your subscribers will increase
I will do that once I am free
JEE wale be like: Make a paper so that this guy can't roast it.. izzat ka sawal hai IIT ke liye 😎😂 (I know this wasn't a roast video but mostly sir roasts JEE badly, & we very much love those videos)
JEE problems are mostly correct , but last year was bad 🙂
@@PHYSICSSIRJEE Sir I think the anomalous qns of last year are over
@@puspalpaul185 not yet , I think . Let's see
@@PHYSICSSIRJEE Sir plz do take the previous practice problems in decreasing order of difficulty sir 🙏🙏🙏 ..... Although most of them are well disscussed in cmnt section and discord
@@puspalpaul185 I will try as much as possible with whatever free time I get
Thank you sir for such relevant content. Really learnt Bernoulli's equation in more depth.
Sir your long conceptual videos are gems ...thanks sir thank-you so much
Sir also dont forget to make video on inductors involving mutual inductance plz
Already done last week. Please check playlist
sir the practice problem 1 was from my coaching's AITS 😂😂😂😂. Thank you so much for giving such a superb clarity in this concept🙏🙏🙏
Thank you for your appreciation 🙂. Keep visiting the channel 🙏
@@PHYSICSSIRJEE
Thank you so much for your reply sir. Your videos are really providing a great aid in my prep🙏🙏. The practice problem discussed in this was solved by me in the paper but I was unaware of that conceptual error I made there. Thanks again for this video 😊😊😊😊😊😊
SIR THIS VIDEO IS REALLY WELL MADE.VERY CRISP AND VERY ELEGANT.😊
Sir i like ur effort of providing all these tough question free in you tube for jee asprirants . Really i like your passion sir🙏🙏💜.I hope you will continue the you tube channel. And we will definitely support you sir
It was very nice Question...
Solved while giving mock test ☺️🤩
16:40 The eq is applied in 2 places which r not connect by streamline
solun t 2nd problm I'm getting B &c
Thanks a lot sir for such a knowledge rich video. Deserving students are getting this quality content seating at home, free of cost.
Very nicely explained sir. Which app you use for making videos, sir?
Zoom or msteams , pdf annotator or open board
@@PHYSICSSIRJEE ohk thank you sir.
thank u sir..very nice..the practice problems really help in catching the actual intuition of the concepts...keep it up sir...
I had problems regarding this topic Thnx sir
sir it's a humble request to make a video on physical difference in pressure energy and kinetic energy of a fluid
And video on difference between angular frequency and angular velocity would be highly appreciated
Pressure energy was already explained . Please check fluid dynamics playlist
The second one is very trivial . They are two different physical quantities. May be , we look at their difference from a problem on phasors
@@PHYSICSSIRJEE ok thank you sir
7:08, sir i had already commented on that video a long time ago, regarding some key point which was missing in that video, i think if you would have followed that comment, it would have saved you some time while preparing for this video. Besides, i was also expecting that you would discuss the applicability of continuity eq.n in the different reference frames (ground and train). I hope you should give a thought on this, it will enrich you.
otherwise 👍👍👍
Continuity equation is based on mass conservation . Here it takes an easy form w.r.t train . I had to take care of length of the video , so had to skip that in ground frame. We will surely address it in a future video
Btw , I missed your comment on the old video . I have now replied there 🙂👍🏼
Great one sir :-)✔️
Another gem of a video
Thanks sir👍👍
Thank you sir. My concepts got crystal clear for Bernoulli's eqn😄
Love you sir....that was amazing
Sir you just a gained a subscriber
Thank u very much sir , u truly fulfill learning physics, u have got a xtra daily learning student now 😎😎😎,
Thanks sir for the amazing analysis i was able to solve it in a first try since the expression was it self a hint ❤️❤️
sir at 16:34 cant we do like F=Ro*A*v^2 and also Fmax/t*(side length)= shear stress and equate them....by this am getting answer as B and C.... thank u soo mch for this video...almost forgot about rotational and irrotational flow
Your formula is correct for air hitting normally on the window , not here
noble prize winning analysis
Kuch bhi 😂😛
Sir please leave the answers to all the practice problems in the first comment. That way we can atleast confirm our answers, and check if we understood the concept.
This is specially helpful while refering past videos of the channel, for you won't be able to confirm answer for them now
Usually, I like or pin the correct students' responses in comments section . You may check 👍🏼
@@PHYSICSSIRJEE Ok sir. Thank you
In the original problem of JEE, we could relate the velocities of air at far away point and at nearby point(in train frame) using equation of continuity. How can we get the velocity of air(in car frame) at nearby point in practice problem 1?
17:06 sir i am getting answer as AD, which i have checked from the comment section is the correct answer. But I am not sure whether my approach is correct or not. I solved this question by applying Bernoulli's equation in frame rotating about the axis, using the approach you shared in one of your other videos. the equation which I made was
*P0-(rho)w^2(L/2)^2/2=P0-(rho)w^2L^2/2+ (rho)V^2/2*
can you please confirm sir if this equation is correct? I am confused because my teacher while teaching this topic gave us a similar question in which he put pressure at point P1 and P2 to be different, and applied Bernoulli's equation, and he calculated the pressure difference by equating it to centripetal force on center of mass. Isn't this approach wrong even though it gives correct answer?? shouldn't the pressures at 1 and 2 be same as they are both open to atmosphere?
Some people can even kill you with happiness 💕
Even the air at windows was rotatory pressure outside of car was high sir??
We love you sir!(God of physics)
Sir Can you please explain why flow is steady wrt submarine ( in the first example) when submarine attack a particular pt. then will not it's speed change wrt submarine
Then even if the speed changes it's fine because at different time particle will not be at the same place, it will move and take different area of cross section
Sir can you plz name the book from which you took the submarine moving under water problem to describe unsteady flow
This one 👇
www.amazon.in/dp/1118116135/ref=cm_sw_r_cp_apa_glt_fabc_6BBSH128FY2G5KHTX014
@@PHYSICSSIRJEE Thank you very much Sir❤️
if a button exists for million likes ....i would click it for this video
12 :50 sir, if we consider another point D beneath the car ,then we can’t apply Bernoulli between point B and point D ,as velocities of these points will be different ,so it is a rotational flow ,now consider two points in front of car E and F which are more or less identical ,then a streamline goes from E to B (top of car) and another streamline goes from F to D(beneath the car ) ,now I can apply Bernoulli between E and B and also between F and D ,as they are on same streamline ,as point E and F are identical ,then indirectly we have applied Bernoulli between B and D ,which we shouldn’t have applied bcoz it is a rotational flow ,then sir how are we getting the same result as if fluid was irrotational,please help
Sir Another Amazingg video!!!🤩🤩.
But I have a very silly doubt in Practice Problem-1😬..
If we consider the FBD of the glass, we will have ∆P×(Projected area)=m(a).. Since the car is moving with a constant velocity a=0. Hence Pout=Pin.. But there is something wrong here. Can you please tell my mistake sir
There is force from fitting of glass to frame. You can't write that . Pressure inside a closed car can be anything maintained
@@PHYSICSSIRJEE thank you sir!!🤩
Sir here if the train tunnel was not tube shaped but cone shaped we could nt apply Bernoulli theorem na sir in trains frame ?
Wonderful concept sir
Sir to find pressure at the stagnation point (2) in the STANDARD Example You Took, why p2=1/2(rho)v1^2+(rho)gh
why is it not p2=1/2(rho)v1^2+(rho)gh+p0
What I mean is why don't we add atmospheric pressure in the RHS of the final expression?
So my answer is coming (Po+518)kPa
I don't think the Po terms will get cancelled both the sides bcoz P1=Po+(rho(gh)) and pressure at point 2 is asked ,,,, which should be the net pressure on point 2
Sir then how roof of a room blown away in wind if we can't apply Bernoulli between top of roof and inside room????
Open room or closed room , Bernoulli applicable or not , it's fundamentally ∆P that ensures blowing away of roof
Sir how that ∆p is created between top of roof and inside room?????
Sir please reply 🙏🙏🙏
Sir how would we solve this question with respect to Ground frame?
Please kindly, if possible, watch the video completely. Lots of stuff to learn and think about🙂
Explanation for your point is indirectly done at 5:14
@@PHYSICSSIRJEE Sir I actually went through the video thoroughly and I understood your point. I also read the unsteady flow portion from the Munson Rothmeyer book as well. It stated that solving the unsteady flow problem was out of the book’s scope. Hence I asked whether you could how to solve without changing the frame of reference to the submarine. Also thank you sir replying on an old video
6:51 sir can you please tell the name of book ?
16:39 sir plz explain how the 1.6 × t term comes on RHS
Same problem bro its not area × thickness it does not makes any sense to multiply volume by strength.
Why you didn't used ro×g×h in bernoulli's equation
Simply amazing
Sir at 7:03 why aren’t we considering potential head for point 2 while writing Bernoulli equation in submarine frame
Already answered below in comments . Density of air is very small , so pgh term for the dimensions of the train is negligible in comparison to other two terms of Bernoulli's equation
@@PHYSICSSIRJEE oh okay sir👍
Sir, in the first AITS problem could you please explain the term-- (sigma)x(1.6)t? What is 1.6?? And Sir why is the shearing strength given, if a longitudinal force is going to act on the window..Also does shearing strength mean it is the shear modulus? Thank you for this wonderful video SIR!!
1.6 is the perimeter. Basically, 1.6*t represents area of the side strip of the window.
At 7:04 which book were you referring to ?
This one 👇
www.amazon.in/dp/1118116135/ref=cm_sw_r_cp_apa_glt_fabc_6BBSH128FY2G5KHTX014
You are taking up those debated topics which even mech janatha of iitm avoids !!great work
Well i solved the problem myself, but I still feel there is something missing in my logic.. also i didn't get what the pressure inside the train had to do with this as i applied the Bernoulli's equation b/w the front of the train and sides.. not completely satisfied but eagerly waiting for the premiere to unfold this one 😋
Same
yeah same
hey dude, how was the exam?
@@harshitmishra7138 what do you think 🙃
@@amiyancandol4499 i am a JEE2022 aspirant actually so was asking how was it for you...ive heard you cleared kvpy sx so...also i tried to solve few questions from the paper...i took up maths paper 2 first and tried Q.3 and Q.4 first...they seemed easy...i know there is a lot of difference solving at home and solving during the actual exam....but how was it for you tho?
400 likes over 0 dislike
It might be the best outcome sir!
Edit: after one month still 0 over 868 likes op
400 th like is mine 😊
@harshit gupta kvpy copyright XD
@harshit gupta kvpy you both are very down to earth bruhs ..... proud to be ur friend
@harshit gupta kvpy tumlog ka level hi alag he ..... tumhare jaisa koi to iss time pr online bhi nhi he 😂😂😂.... msg krre to ignore mardeta..... Thats why
Sir is the answerkey given wrong for this question?
No
For next video plz give telegram linc sir in description box ,previous linc has been expired. Hopefully waiting for next video and also for discord
sir i am really anxious I worked hard over the past 2 yrs and im sure i can do well in all levels of paper other than 2020. In the 2020 paper i was unfamiliar with so many concepts. What can I do about this sir now that only one month is left?
Sir why did you not account for the height factor while applying bernoulli qequation or you assumed that points 1 and 2 are at same straight line approximately
Height or dimensions of train are not mentioned in problem, hence not considered. Practically also , pgh term will be very small in comparison to 1/2pv^2 for usual speeds of train ( p = density of air )
@@PHYSICSSIRJEE ok sir thankyou so much for replying and also thanks for such a great explanation
AWESOME EXPLAINATION
Can we say that the fluid is not the same.
Hence B.T can not be applied between the two mentioned points , one in the above air and one inside the car?
Not same streamlines is better way to argue
Sir in my opinion they should also mention that speed of 🚆 is high because there is difference in average height between two sections of fluids which leads to ( density) ×g×∆h .
Obviously if speed is high enough this term becomes humble against (density) v^2 like terms
With rho of air = 1.3 SI units , gravity term is negligible
But sir that (rho) appears in 1/2(rho)v^2 term too; so it can be comparable to (rho)×g×h depending on speed...
And yes thanks for this amazing video!
@@anubhavsrivastava4906 yeah , usually trains do travel at high speeds anyways. Also when dimensions of train is not mentioned , it's a hint to ignore h
@@PHYSICSSIRJEE They indeed travel at high speed inside a tunnel 😅...
Thanks sir🙏🙏
Thanks a lot sir
I messed up while solving by myself ...but thank u sir
Sir where is the solutions of Practice Problem 1 and 2 unable to find please give
sir the solutions of practice problem 2 you didnt give please give that sir ......and sir one more thing when will the video solution of all the practice problems come ..im waiting since so long please help
Sir why ro gh is not taken at points 1 and 2...even though its on same line but vertical height is not negligible... Plz explain.
Already explained in comments . Anyways rho is very small for air . Hence negligible term
Thank you very much sir🤩🤩🤩🤩
Sir what is the answer of sliding rod problem posted by walter lewin sir?
It will loose contact at particular height h only . Where h/H is fixed fraction . H is initial height . I don't want to spoil the question by revealing exact answer here 🙂
@@PHYSICSSIRJEE ok sir can you please tell where the question formal wording is given so I can understand the ques properly?
@@riddheshpatil7598 David Morin, I don't remember the page number
@@PHYSICSSIRJEE No issue sir I will find it out.Thank yOU for quick reply
Sir do you also mean to say that inside train pressure will be equal to atmospheric pressure as ...
I didn't mean it . It was mentioned in the question. It's not a result of Bernoulli's equation. It might be maintained by some ventilator or air conditioner inside
@@PHYSICSSIRJEE ok sir ❤❤❤
Actually I didn't knew what ambient pressure means
@@riitk69 now you know 😉🙌
@@PHYSICSSIRJEE yes sir ❤❤❤
Op video sir.. 💙🌸
Begumpet ameerpet ma janardhan sir very great.. 🤩🙏
😂
Sir while applying Bernoulli theoram why didn't you took rho(gh) into account?
Rho is small ( air ) ... Also h is not mentioned . It's a good hint to Ignore it
Amazing teacher
Thank you sir 🙏🏻🙏🏻🙏🏻 🙃
16:40 sir what is this 1.6 × t
Another mistake, I think it should have 0.4
Can anyone explain why 1.6t
Sir I have a doubt
U said in your Bernoulli equation video that we can't apply Bernoulli equation wrt a moving frame since surface also does work there
So why are we applying it here wrt train that is moving and how is that work ignored?
Because there it was unsteady and here it is given steady flow
@@PHYSICSSIRJEE sir but does it matter? The surface will still do work coz we are taking a moving reference frame, how are we ignoring it here?
@@yatharthgupta6468 here, there is no tapering on side walls of tunnel , so , why w.r.t train will they do work?
@@PHYSICSSIRJEE but doesn't the train have tapering? For example in front of train
@@yatharthgupta6468 yes , w.r.t train this point of application is at rest . So work is zero here
Sir can u pls suggest some good book on fluid mechanics to cover such concepts in depth
Irving H shames , not all of it
@@PHYSICSSIRJEE ok sir thanks
@@PHYSICSSIRJEE sir which parts of the book should I study for jee , olympiads
@@abhijeetjain2252 depends on your teacher / mentor. My advice is to go through contents and choose a subtopic and start
@@PHYSICSSIRJEE sir is its pdf avaliable ? , I tried but couldn't find
Sir at first I wasn't able to recall the concepts of Bernoulli
When I go through the question
From where I can get these similar type of problems
Since I haven't solved this type of problem yet
Then how will be solving at the time of my JEE advance
I have solved hcv and dc Pandey but still not able to solve it
Please attempt aits , fiitjee and Allen
0 dislikes till now 😄😄. Maybe that one guy who used to dislike all videos got tired.
Don't worry , they will be back. It's fine , even I can continue to improve 🙂
even arora sir could not give such a clear explanation.
Thank you sir 😊😊
❤️❤️ love you sir ji
# Jee Advance 2023
#jeeadvanced2023 , like this 🙂
@@PHYSICSSIRJEEAlready liked Sir🤞