Introduction to Pressure & Fluids - Physics Practice Problems

Рет қаралды 552,860

6 жыл бұрын

This physics video tutorial provides a basic introduction into pressure and fluids. Pressure is force divided by area. The pressure due to weight of a fluid can be calculated by finding the product of the density of the fluid, the gravitational acceleration and the depth of the fluid. This video contains plenty of examples and practice problems.
Volume Unit Conversion: • How To Convert Cubic C...
Specific Gravity & Density of Mixtures:
• Specific Gravity and D...
Will It Sink or Float?
• Will It Sink or Float?
Intro to Pressure & Fluids:
• Introduction to Pressu...
Atmospheric Pressure Problems:
• Atmospheric Pressure P...
____________________________
The Gallon Crusher:
• Physics - Fluids & Pre...
Absolute Pressure Vs Gauge Pressure:
• Absolute Pressure vs G...
Water Pressure Vs Gauge Pressure:
• Water Pressure, Gauge ...
Pascal's Principle - Hydraulic Lift System:
• Pascal's Principle, Hy...
Mercury Barometer Problems:
• Mercury Barometer Prob...
_____________________________
Open Tube Manometer:
• Open Tube Manometer, B...
U Tube Manometers:
• U Tube Manometers - Pr...
Archimedes Principle & Buoyant Force:
• Archimedes Principle, ...
Full-Length Videos and Worksheets:
/ collections
Physics PDF Worksheets:
www.video-tutor.net/physics-b...

Пікірлер: 192

@TheOrganicChemistryTutor Жыл бұрын

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Amazing. Thank you! You got me started on the penultimate chapter of my mechanics class. I was feeling hopeless. Not anymore :)

@HakanYalcintas 10 ай бұрын

I have a physics test and I was struggling with understanding the concept of pressure but your videos man are the life saver. Thanks brotha 🙏

@lowquality_zaza. 5 ай бұрын

same broo

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@nickraifmai9772 5 жыл бұрын

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@obembeolaniran5998 Жыл бұрын

Phenomenal. You're just great at teaching!!!! You always handle things with a light touch

@sisandamkhonta7365 2 жыл бұрын

this was so helpful. You made physics so simple..THANK YOUU!!!

@PixelPulse03 3 жыл бұрын

thank you for the great explanation!

@joeryvandamme5732 23 күн бұрын

such a simple concept, yet blew my mind. thanks

@user-sh1fy9nf4m Жыл бұрын

This is another lesson that i have a exam for in less than 1 hour this vid saved me

@CristaRonaldo7 3 жыл бұрын

Great, this really helped me!

@yosef4742 Жыл бұрын

Pretty straightforward. Thanks 👏

@taaha6335 5 жыл бұрын

Damn this guy explained it like a proooo

@chocochomzy5031 11 күн бұрын

Thank you for the simplicity of this calculation ❤

@gillesR337 2 жыл бұрын

really good video, I like it!

@TEACHER.CLEOPHAS 2 жыл бұрын

Great lesson.

@roll1112 Жыл бұрын

The all world salutes you sir❤

@michaelmarkmalgwi720 4 жыл бұрын

that is great bro.

@user-ww4pe6zi8f 4 ай бұрын

Very helpful .Thanks alot.

@sarahjoan2132 6 ай бұрын

Thakyou so muchh!Your videos help me a lot in my academics!

@shirazunakajima7944 9 ай бұрын

7:58, do these numbers make sense? No. Do they serve their purpose? Absolutely! Great explanation and content, sir!

@komranbehbehani6379 3 жыл бұрын

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@keikay2733 2 жыл бұрын

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@mahmoudahmedramadan1651 4 жыл бұрын

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@manafovamariyam7496 3 жыл бұрын

really useful

@juwairiyahayub3436 3 жыл бұрын

Thanks a lot,

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Thank u 🙏

@fatimaalfehaid 5 жыл бұрын

Thank You..All the best

@tomatrix7525 4 жыл бұрын

Being extremely picky, at 7:00 the problem does not allow us the find the surface area technically. You are assuming the dimensions are in the order l x w x h but while this is the standard way, multiplication is commutative so it may not be in that order. The area of the base could be 6(5) for instance. Question should perhaps have been more specific

@beautifulday1665 3 жыл бұрын

At the end when substituting in the pressure equation, you WILL multiply ALL of them sooo....

@passionworld2054 3 жыл бұрын

That's true bro, if the problem were more specified I would get the correct answer but no worries

@amrojjeh 2 жыл бұрын

@@beautifulday1665 Only two variables cancel, leaving one in the numerator. Depending on what you choose height to be, you can get a different answer

@edusenveza6391 Жыл бұрын

Thank you

@yonathanabuhay3584 2 жыл бұрын

My teacher gives me the questions that is exactly like yours and I have got two marks cuz of you tnx

@doublew030 4 ай бұрын

Just subscribed! Thank you for your help

@loves2spooch26 6 жыл бұрын

good stuff

@TheOrganicChemistryTutor 6 жыл бұрын

Thanks

@ZULFERISYAHPUTRA 3 жыл бұрын

Dear Sir............Example Problem : One hydraulic cylinder, the end is connected to the Threaded rod so that it can be rotated. Cylinders with a bore size of 18 mm, 10 mm rod and a stroke of 300 mm single acting in a condition that is filled with oil. If the cylinder is rotated 10 mm. a. How to calculate it b. What is the gauge pressure

@animeisaculture5556 6 жыл бұрын

Good job explaining :)

@Eric-sq4hd 4 жыл бұрын

Sal Khan is so freaking confusing. JG just relaxes my brain and clears everything up.

@rajegaming7210 4 жыл бұрын

who is Sal Khan btw

@rajegaming7210 4 жыл бұрын

is he from khan academy

@mubashirmuneerfanclub9064 3 жыл бұрын

@@rajegaming7210 yes

@adityaranjanroll2ixa668 3 жыл бұрын

Thanku sirr

@AndresGarcia-cl6td 4 жыл бұрын

in the last one what happens with the area?

@GamerKidofficial Жыл бұрын

May God bless you mann

@user-gt6qh5be7o 3 жыл бұрын

I love you man

@Shackled 4 жыл бұрын

Good stuff, thank you! However on the last example, why would one assume that you would use 9.8 for gravity again when we were initially told that the gravity of the fluid was 1.7? Would gravity not be uniform?

@nilasubramani2820 3 жыл бұрын

Specific gravity is actually the relative density of a substance, therefore he used that value to calculate the density of the fluid. Whereas the gravity of the fluid is always 9.8, due to the gravitational force from earth. PS. Someone please correct me if I am wrong

@beautifulday1665 3 жыл бұрын

@@nilasubramani2820 you're absolutely right..... we have to differentiate between " the specific gravity OF A FLUID " AND " *_THE ACCELERATIONAL GRAVITY or, in other words, the gravitational force from earth...._* ...

@OjinSZ 3 жыл бұрын

@@beautifulday1665 Ahh i see, thx for explaining i was so confused before

@adanibrahim 11 ай бұрын

Thanks

@davidekekezie5436 3 жыл бұрын

LIFE SAVER

@roll1112 Жыл бұрын

I hve become so dependent on you that I don't understand things if not explained by you 😅

@blindside9921 3 жыл бұрын

can i ask how do you find the pressure on top

@cheesecake9178 5 жыл бұрын

I got a question does force in p=f/a refer to the net force on the object or is it the force in the same direction as in the formula w=fdcosø

@justarandompotato7500 2 жыл бұрын

Waht.

@zoro-i 2 жыл бұрын

I don’t understand this. Why ph20= 1000kg ?

@loves2spooch26 6 жыл бұрын

why dont you plug in 1.7 for g since its the specific gravity of the fluid?

@theduckmugnielsen7038 5 жыл бұрын

Gravity and gravitational acceleration is now the same

@user-kg6fm7cn4j 3 жыл бұрын

How did you get 9.8 as the gravitational acceleration?

@amrojjeh 2 жыл бұрын

It's one of those things you gotta remember! Essentially though, you get it from a few experiments. But because it's roughly the same number wherever you are on earth, it's become more practical to memorize it than to calculate it every time.

@therockstargamer4598 5 ай бұрын

Bro thanks cus everytime I open KZfaq I get these Indian people(I am Indian aswell) in my KZfaq and since they speak a language i dont know, i cant understand anything. Luckily, I found u

@fadul7026 5 жыл бұрын

Can someone explain why he made it mg/A and whats mg

@karanmaan31 5 жыл бұрын

Force = mass x gravity F = m x g , where m = mass and g = gravity Pressure = Force / Area P= mg/A

@renenarcissebeyongol3467 2 жыл бұрын

this pressure thing is so complicated

@ahnaf_akif_mbbs_bd_ksa Жыл бұрын

sir , do we have to use h= 3 m because of the concept : center of mass at question 2

@natspro5411 Жыл бұрын

Thanks but where hv u got the pressure on no. 1

@TekleAssefa Ай бұрын

I love physics so much🥰🥰

@shahmeeriqbal9073 5 жыл бұрын

Um, look in the first example what if we take force 150 N since from kg to N multiply by 10.. And the area as 70 multiply by 40 = 2800cm. 2800/100= 28m So P=F/A P=150/28=5.35 which is different from ur answer. Whyy??

@theduckmugnielsen7038 5 жыл бұрын

This is because area is measured in square meters. You have to divide by 100x100 to get from square cm to square meters. NOT 100. Hope this helps:)

@mrmotion7942 3 жыл бұрын

I thought the same 70cm * 40cm = 2800cm = 28m 0.7m * 0.4m = 0.28m ?

@mrmotion7942 3 жыл бұрын

@@theduckmugnielsen7038 Yes yes yes. Thanks. I just realised. :D:D:D:D Thanks so much

@dimitrifrangou1678 5 жыл бұрын

How would u work out the volume

@mrmotion7942 3 жыл бұрын

Width * Length * Height :D

@ghgjftythnhcfghdty 4 жыл бұрын

The leff times the whiff?

@xahmed9464 Жыл бұрын

ghgjftythnhcfchdty? more like zsiedufhseaklrjgnjksbgisdfhuisdfhaskjrbgzsdjhhbsdjfgh

@jorgeeduardocarrenozapata4243 3 жыл бұрын

P is not equal to F/A, it is the component of F perpendicular to the A divided by the A.

@lordofcows8529 7 ай бұрын

its implied to mean that

@gnation855 2 жыл бұрын

Pls is the pressure in the middle of a container the same as in the bottom or we have to divide the pressure by 2

@gnation855 2 жыл бұрын

Pls do reply my question

@Foasperfect 5 ай бұрын

يارب انك تسلم 🩵

@iorkyaseaondofa9828 2 жыл бұрын

please, how long does it take to fill a swimming pool 7.5m times 18.0m with an average depth of 3.5m, if the water flows from a pipe of 1.5cm diameter with a speed of 1.5m/s?

@malekstudies0944 2 жыл бұрын

in 4:27, why do you convert cm to m? is it because we want a value closest to a one digit number or? I dont understand

@imhypedyt 2 жыл бұрын

pressure is force (SI units would be N) over area (SI units would be m^2). If he had used cm^2 instead of m^2, it would have given him an inaccurate result.

@joeryvandamme5732 23 күн бұрын

this is interesting.

@StephenAbilli 3 ай бұрын

everything is clear

@twaibaawadhsuwad3300 3 жыл бұрын

4:03 how did it become N newton?

@dennys288 8 ай бұрын

good

@mdushandu4818 Ай бұрын

what software do you use to create your screencast?

@anshuman6243 5 жыл бұрын

Nice 👍 video I want to correct you in the first numerical. You wrote block and further you wrote book . Nevertheless, your video is the showcase of your efforts.👍🏻👍🏻👍🏻👍🏻

@ipeacegene8064 2 жыл бұрын

I don't understand why does specific gravity equals to the density of fluid relative to the density of water. Can somebody help explaining this to me ?

@doriangreg1601 4 жыл бұрын

we have an exam tomorrow and the teacher never even mentioned pressure ;-;

@boubacarsidicoulibaly3124 7 ай бұрын

For the last case can someone explain it to me? In the exercise they gave the specific gravity of the fluid which is equal to 1,7N/m³. And we know the specific gravity(noted gamma) is related to the acceleration(g) by the following formula: gamma= (rho)×g For the pressure: P= (rho)×g×h thus P= gamma×h My question is why did he take the density of the water to calculate the pressure if the specific gravity is already given? Please i'm a little bit confused. Thanks in advance for helping me

@Profile_unavailble 3 ай бұрын

hi 3.45 , why is it 9.8m/s2?

@saberboi1526 5 жыл бұрын

Ok so this has been bothering me a little bit, Ive been getting more into pressure physics and every time I think about the shape of a cone and specifically the tip of the cone I can never think of how much pressure is techinally there because how do you measure the surface area for the tip of a cone. Like with a crossbow bolt tip or the tip of a spinning top. Could you help me figure this out?

@supreetsingh987 5 жыл бұрын

That is confusing

@saberboi1526 5 жыл бұрын

@Bill Blogs It did help, I was having difficulties when trying to measure hypothetical scenarios. But yea, I was trying to see if there was some way to determine pressures at the very point of a conical surface without the use of micrometers or calipers. In retrospect my comment seemed a bit confusing now that I am reading it again. Thank you very much, I get stuck sometimes.

@TheStrafendestroy 3 жыл бұрын

@@saberboi1526 integrals with specific heights you want ?

@Tortle07 Жыл бұрын

writing this hours before my exam, hopefully i dont have to come back for the retake exam...

@vinci7667 2 жыл бұрын

am i the only one who don't understand this no matter how hard i try

@charnethekisho7749 2 жыл бұрын

nope me too😢😢

@delightmkhabela6760 Ай бұрын

Yes

@Trshbowt-gj6si Ай бұрын

Omg same wtf 😭🙏

@abdulrahmanmohamed2470 2 жыл бұрын

Shouldn’t the height equal to 4m 8:04

@Juwar1974 4 жыл бұрын

Wait a second. I'm confused about the last problem. What about the area? Don't we still need the area of the cylinder since Pressure = Force / Area? Why wasn't area calculated?

@thetranscendent7825 4 жыл бұрын

the length and width canceled each other out. He just skipped that part

@mostonphiri2756 Жыл бұрын

Consider the second example where he derived that formula of pgh

@faizasikandar6050 4 жыл бұрын

Why u didnt put minus 9.8

@sharifluttamaguzi9872 3 жыл бұрын

why would you use 9.8ms-2 instead of 10ms-2 don't you think some people may get confused because some of them may not know that you round of to get 10. But anyway.....it was a useful video to me.....hit the like button if you agree