Basics of Linear Momentum Part 2 [Fluid Mechanics #28]

[@eminemnguyen2103]

9 years later this video is really helpful. Thank you, you are my teacher. I really appreciate what you did for the students like us.

[@SimmySigma]

Aw thank you so much for this comment, it meant a lot. And I'm so happy it still helps students! Best of luck on your studies! 😊

[@eminemnguyen2103]

@@SimmySigma yess. Thank you so much. I will share your videos to my friends to help them. I wonder how old you are now, teacher 🥰

[@SpencerRemy]

Man I have been struggling with this material and the way you laid everything out was very helpful. I'm good at statics but something about fluid mechanics doesn't quite click the same. Really appreciate this content!

[@SimmySigma]

I’m glad it’s helped! And don’t worry it took me a while to understand what I know about fluids. It’s not as straightforward as statics but don’t worry- just keep practicing and stay consistent and the concepts will begin clicking!

[@rezasaceda]

Peanut butter!

[@russellnasrallah5816]

I can't stop laughing.

[@SimmySigma]

Thank you so much! I appreciate the comment and I am pleased to hear this is preparing you for this coming Fall. Personally, I do not have a study guide I used, but the best way to understand the concepts is to get your textbook early and try to find some similar problems that were discussed in this playlist and other Fluid Mechanics videos around KZbin. And also continue doing textbook problems, even for the concepts you understand.

[@paulzimmermann2829]

I don't know if you still read comments on your old videos but this was very helpful. I am really gratefull and wish you the best.

[@SimmySigma]

When I have a free moment, I still do. :) Thank you for the comment and I’m so glad it was helpful!

[@garlandgurl07]

I’m surprised no one has pointed out the incorrect cancellation of units at 9:20. Slugs and lbf do not have a 1:1 ratio. 1 slug = 32.2 lbf. Thus V2 = 6.9ft/s

[@NoPretending]

This is very helpful and helps me to understand just the pure basics of the calculation. thank you very much! this makes learning much easier, as I have no professor to teach me right now

[@TheAtlasPrime]

Thank you very much for your videos. They have really helped me prepare for my fluid mechanics test. ( Studying Bachelor Of Petroleum Engineering in Australia).

[@carlosromancini8226]

amazing explanation!! i am from brazil and i couldnt find a video like this in portuguese anywhere, thank u a lot!

[@SimmySigma]

You are very welcome! I am glad these videos are helping. :)

[@oshearichards8627]

yea caught me off guard with "peanut butter " lmao

[@millertime2115]

I understand the concept now thanks to your video. Thank you!

[@harmomixer2039]

Thank you so much Sir, 8 years later and it is still very helpful

[@backyardmachinist]

Great video! Thank you for sharing your knowledge with us. So you concluded that the force of the bolts, F_b = 9.44lbs. How would one size the bolts for such an application? If Stress = F/A_c --> 9.44lbs = stress*A_c I realize that the cross sectional area of the bolts, A_c can be multiplied by the number of bolts around the pipe's flange. What would you say is the driving design factor for sizing the such bolts? I realize this goes outside of the scope of this video, but would it be the stress on said # of bolts? Would we take into consideration the nodulus of elasticity, E, of the bolts, given their material? How would the equation, Stress = strain*E factor into this design challenge? Thanks!

[@SimmySigma]

And as far as my class notes go, I am not sure how useful you will find them, but I am planning to scan my notes I use for these videos and post them online as soon as I am complete with this playlist. Ill make sure to market them across my Twitter and Facebook accounts as well! :)

[@Abdo1825]

This is awesome, man. Great job. Thank you !

[@kansarabhargav7802]

Thank you very much for this wonderful video. It cleared up most of my difficulty in understanding the concept.

[@SimmySigma]

I am glad to hear that! :)

[@clintdunn7710]

Assuming that the atmosphere isn't a vacuum solving with absolute pressures gives a different result than solving with gauge pressure (for systems where the area in isn't equal to area out). I think the answer generated using abs pressure is more accurate. Thanks for the videos they're great!

[@bonnax07]

Clint Dunn i agree. In Geankoplis book, gage pressures are used even the area of the input and output streams are not equal.. in welty book though, absolute pressures are used. i don't what to follow anymore

[@clintdunn7710]

Bonn Moran Can't go wrong with absolute pressures, I don't think gage pressures would be appropriate unless the areas were the same.

[@nylye9496]

At 0:34, momentum isn't mass x volume, its mass x velocity..

[@jorgeraoul]

Everybody gets nervous and tests and makes sure there students are listening

[@ColeJT]

Helpful video. Clever how you tied in Bernoulli with the momentum concept as something needed to solve for your unknowns!

[@jadad1010]

if 5*pi still in terms of lbs/in^2 , was there conversion done at some point? because everything to the right side of the equation was in terms of feet

[@AS-fm5ew]

you are doing a very good job....In fluid mechanics I find your explanations best one..plz upload more videos and your notes too....Thanxx bro..

[@AS-fm5ew]

I didn't understand that why you have included pressure force(5 pie) in the momentum equation. Because this pressure force don't changes the linear momentum (if flow is steady) this pressure force is equally balanced by viscous force in steady flow. Please explain this point.

[@tomkisubi4805]

Good Job Man!

[@magaldi_espresso]

Very helpful, thanks from Brazil

[@JackJack-lz5vi]

@ 2:41 PEANUT BUTTER!!!!

[@محبيالياسشاكربيلي]

Thankful for your efforts

[@Sonther]

Thank you, very nice explanation.

[@foojanka3162]

if the jet wasnt free to atmosphere,then what the effect will be on forces?

[@jorgeraoul]

Thanks for the awesome explanation

[@mohamed3asfour616]

Thank you 😍😍😍😍😘😘 From egypt

[@garrettjones3454]

why do we ignore friction ??

[@emergency.jergens]

This might be a stupid question, but is the system accelerating? I mean, the net force isn't actually equal to zero, so there must be some kind of acceleration. Is my reasoning sound? or am I missing something?

[@AS-fm5ew]

You are right bro there is a mistake in this video...if it is a steady flow then we can't include pressure force in momentum equation because in steady flow that force is cancelled by viscous force.

[@cikdin88]

Assume flow is steady, imcompressible and frictionless otherwise we cant use the bernoulli.

[@Littlefa3]

+Ashish Sandhu but he assumed the fluid was non-viscous, so there isn't any viscous force.

[@sachithrafernando7758]

Thanks man, very helpful! :)

[@phunming1463]

Thanks For Sharing ! It really useful! :)

[@petter9078]

Took some time to understand what "LM" was. Still awesome tut. Thanks.

[@islam3164]

But since water is exiting the nozzle then how is the velocity 0?

[@josephdaniel1194]

The velocity of the nozzle is zero. The velocity of the working fluid (water) is not zero. The total momentum of the selected control volume is the sum of the momentum of the nozzle and the fluid. The fluid has momentum as it has velocity. The nozzle does not.

[@mustafak4b]

you didnt need to use the bernoli equatio, since you have Q=v1A1 you can solve for v1 and use that information to find to solve for v2 using the equation you set up

[@JustinHRD]

No. In the problem statement you are not given a mass.

[@hsoley]

useful stuff, thanks!!

[@youpengzhu1399]

I was so focus on the content and suddenly heard the "Peanut butter".=-=. Couldn't stop laughing hahaha

[@atulanand4824]

can you please provide your notes sir???

[@YazzaY1]

peanut butter

[@LiathANaji]

why P2 is zero

[@wrenchesinthegears]

Good stuff. However it Would be a bit easier to follow if you had kept the units in your calculations throughout

[@Hockeyrocks229]

peanut butter jelly time!

[@toheed9693]

it should be V2=1/4 V1 ,NOT V1=1/4V2.. (5 :50)

[@mariustoderas2472]

love u bro

[@96Kaafarani]

Oh what disgusting units!!

[@phrracing1]

Peanut butter:P...haha yummm

[@BenjilinaJoelie]

I giggled at the fact that americans use slugs. its cute.

[@kirolousyoussef8609]

peanut butter and JAAAAAAAM wack vid btw

[@ali848trans]

peanut butter