21. Advance Illustration | Fluid Statics & Dynamics | Force on Tube ejecting a Liquid | Ashish Arora

The website, aimed at nurturing grasping power students, has classroom lectures on almost all the topics. It is an outcome of 23-year long toil of Physics expert who has made it a mission to simplify the complexities of Physics.

Ashish Arora, the brain behind this interactive unique website, has all his lectures available on web for free of cost. He has created a youtube channel in the name of Physics Galaxy. Today more than 6000 video lectures are being watched per day on this website which is highest among any other e-learning website in India. Till now more than 3.6 Million videos are watched on it. On each video subtitles are also available in 67 languages using google translator including English, Hindi, Chinese, French, Marathi, Bangla, Urdu and other regional and international languages.

Besides uploading transcripts of all his videos, he has created a software based synchronized European voice accent of all videos to benefit students in USA, Europe and other countries.

#AshishArora #JEEAdvanced #JEE2020

[orenawaerenyeager]

At 2:22 sir if we write r=b+(b-a)x/l
Here b<a so b-a is a negative quantity
r=b+{negative quantity}
So we get r<b
Which is clearly not true

[balancebreaker]

Sir pls correct me if I'm wrong but radius should vary according to the following:
r= (a-b/l)x +b
Kindly check it...❤
Enjoyed the problem!

[keshavbaldeva]

Best question in fluid dynamics ever seen😵🥵🤙

[vp]

Why pressure at distance x is taken as P - P° and not only P

[birsajoharadivasi]

So far one of the best questions ever seen 😳. I am stunned. Thank you so much Sir ❤

[nakulmantri]

SO LENGHTY QUESTION AND REQUIRES QUITE AN EFFECTIVE GRIP ON GEOMETRY AND INTEGRATION, WOULD RATE THIS QUESTION AS 10/10 IN TERMS OF CHECKING EVRY ASPECT OF AN ASPIRANT'S KNOWLEDGE

[keshavthakur]

At 4:16 shouldn't it be rho*g*h - rho*g*h(b^4/r^4)? And why are limits from a to b and not b to a because x increases from b to a? and in last step why 1/a^2 - 1/b^2 as minus sign is lost during integration so it should be other way around?

[devansh.gupta_]

Caution:please don't try these problems in exams

[kripakanodia]

Sir shouldn't it be b+(a-b)x/l as if we take tan theta then a-b/l=r-b/x

[Shreshth.Vishwakarma]

would not the ejecting liquid exert any recoilling force ??

[vishalchaudhary]

Sir radius of elementary section should be[b+(a-b/l)]

[chirahggupta]

Sir jab liquid bahar niklega toh woh bhi ek backward force on tube lagayga?

[winggsss.]

Sir hmne simple wale concept ko use krke force kyo nhi nikala, ( rho*a*v² ) wale concept se . ?? F=momentum imparted in one second.

[winggsss.]

5:08 this is my doubt, when wirting dF why sir write press diff (p-p⁰).???? for finding force we should know the press diff just at the ends of elemntal strip. ..??pls tell

[janvivyas]

GREAT QUESTION SEEN IN AITS THANK YOU SIR AND HAPPY TEACHER'S DAY

[gamezone]

I think this is the longest video in all advanced illustration.

[sarcaastech]

Really awesome problem
I remember sir did a same question in heat transfer where the concept of how to find r in terms of a and b was applied
Also here integration and bernolli therorem and eqn of conitinuity is used
It really helped me to grasp several concept in one video
Thank u so much sir !

[birsajoharadivasi]

Sir one correction..
P - P° = (ro)g.h - (ro)gh (b⁴/r⁴)
There will be - sign not + .

[aruntejachamalla]

Sir, Why shouldn't we apply equation of continuity from S1 to S2 ?

[gautamvashishtha]

Sir for writing dF, why did we take pressure difference as difference in pressure between the elemental strip and pressure at end s2? Why end s2?