Archimedes Principle, Buoyant Force, Basic Introduction - Buoyancy & Density

Archimedes Principle, Buoyant Force, Basic Introduction - Buoyancy & Density - Fluid Statics

Рет қаралды 744,463

6 жыл бұрын

This physics / fluid mechanics video tutorial provides a basic introduction into archimedes principle and buoyancy. It explains how to calculate the upward buoyant force acting on an object and it shows how to derive the buoyant force formula. It discusses how to use free body diagrams to calculate the tension force in a rope supporting a block in the fluid using the buoyancy force and the weight force of the block.
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U Tube Manometers:
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Buoyant Force of Helium Balloon:
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Physics - Intro to Buoyancy:
• Physics - Intro to Buo...
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Hydrometer Physics Problems:
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Volume Flow Rate and Mass Flow Rate:
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Equation of Continuity:
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Bernoulli's Equation:
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Torricelli's Theorem & Speed of Efflux:
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Physics PDF Worksheets:
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Пікірлер: 250

@TheOrganicChemistryTutor Жыл бұрын

Next Video: kzfaq.info/get/bejne/rs5miZekqsu5iac.html Final Exams and Video Playlists: www.video-tutor.net/

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@areebaiftikhar1322 6 жыл бұрын

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@maritesbolano1587 3 жыл бұрын

Wow.. I learned more watching a 15 minute video than a 3 hour long lecture.

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@samrahmohamed2332 4 жыл бұрын

Md. Kamrul Islam could you please tell me the upthrust force is it an example of second law or third law of motion?

@Sibasish07 4 жыл бұрын

@@samrahmohamed2332 third law of motion

@lavina3535 3 жыл бұрын

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@necrtic6349 2 жыл бұрын

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@samlynn7681 7 ай бұрын

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@torikim1901 6 жыл бұрын

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@tahirabubakarumar3635 4 жыл бұрын

Same as me

@unlimitedprojects3087 6 жыл бұрын

You are amazing! Finally buoyant force understood : )

@mikey002 3 жыл бұрын

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@mashalvin2784 3 жыл бұрын

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@user-hv6ef9ie1g Ай бұрын

SUPERB EXPLANATION!!

@mhar9989 5 жыл бұрын

Thanks for the explanation😊

@lucyperry8075 4 жыл бұрын

I found this video and my first thought was 'I love you'. Currently doing a uni exam and my question is similar to this

@matiasarcelus7406 3 жыл бұрын

Thank you for this video it helped understand this formula more

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@rust2822 2 жыл бұрын

Excellent! Helped a lot :)

@hosseinrohani5087 Жыл бұрын

Well explained. Thank you

@10yearswithbtob71 5 жыл бұрын

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@nourfouad2075 3 жыл бұрын

thanks a lot finally the buoyant force has understood

@user-ed3st8bo6r 2 ай бұрын

Thanks for the good explanation

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@EunicePorol 10 ай бұрын

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@heidetenchavez9911 2 жыл бұрын

Key Questions in video: 0:37 Is it easier to lift the block in air or is it easier to lift up a block if it's submerged 1:40 What is the tension force in the rope if the block is in a vacuum? 2:43 What is the tension force if the block is in air? 4:11 How do we calculate the buoyant force?

@suscraft7767 2 жыл бұрын

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@mikebaee7731 3 жыл бұрын

really loved that explanation of boyancy with the cylinder in the deep / shallow water.. this is my life now, getting excited about understanding science - I'm ok with it

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@angeliaclemons755 3 жыл бұрын

Do we include bouyant force for any object suspended in air? I’ve never learned that before

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@redus202 3 жыл бұрын

a) A floating platform is to be anchored in one of the water-sports lake areas to be used as mooring pontoon for safety and rescue boats. It is proposed to anchor the platform to the lake-bed using a makeshift anchor consisting of a lump of cast iron of volume0.5m3, and a length of thin steel cable. Assuming the cable remains vertical and has negligible weight, calculate the tension in it due to the anchor.Take the cast iron density to be 7850 kg/m3 and the density of water to be 1000 kg/m3. can you help me with this please?

@nick2232 2 жыл бұрын

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@samrahmohamed2332 4 жыл бұрын

Which law of motion does upthrust force related please

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@Trading-s3o 3 жыл бұрын

what if we are trying to find the force exerted on a circular window like for example a submarine window. given the density of seawater and radius only? Is the Area the same with either the force acting at top and bottom? given that the surface of the window is flat and submerged vertically.

@SanjaySingh-uu8zf 2 жыл бұрын

Hello i have a doubt that mg +the F1 would be acting downwards ?

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@iu2297 3 жыл бұрын

Movment ,gravity ,wonderful

@naylonaylo5954 3 жыл бұрын

Wouldnt the water above the immersed object exert pressure upon it? It actually supports the water above it? Or does the ground under the object support the water above it? Can i send you drawn problems which you may solve and explain to me logically.

@specialcolors 5 жыл бұрын

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@allistermugaisi1625 4 жыл бұрын

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@ayaafandi9458 6 ай бұрын

i wonder what i'd do without you.

@jacott1382 Ай бұрын

I have a question. So the gravitational force is equal to the bouyancy force (Fz = Fb), but the block and water have two completely different densities, so how does that work?

@alexanderalbertogarciavand2830 3 ай бұрын

What is the box is a open metal box of 20 tonnes? When submerging water will go inside the box... do we have to add the weight of the water + the weight of the metal box?

@martinsimbeye9119 2 жыл бұрын

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@thabanimbatha5235 2 жыл бұрын

phenomenal video.....my question is does a mass an object submerged multiply by it density give us a volume of a fluid displaced?....

@CyberTitan-dy3gy 2 жыл бұрын

I can't explain it theoretically, but no- the unit of volume is m³. Mass × density would be kilogram × kilogram per metre cubed and work out as kg²/m³. In physics, as a general rule, if the units don't work out then the formula is wrong. Don't want to say too much and ill-advise you, but hope that helped :)

@yaweli2968 4 жыл бұрын

What if you have a heavy block sitting on a wood that is partially submerged in water. You know the height of the block and the area of the wood. How do you find the height for the part submerged in water.

@ziadaldohaim3142 4 жыл бұрын

P= m/v. In this case Fb=W, I suppose you are given the weight(m*g=w), and you have the density. Therefore w= V*p*g. If you already have the Length and width, Make V= l*w*h (h is the submerged part); and solve.

@juliatakahashi1121 4 жыл бұрын

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@sprout_draws4855 4 жыл бұрын

高橋julia poor gurl i feel sorry for you

@rizkaapriliani733 2 жыл бұрын

hi sir, first of all thanks for the video, it really helps! but i'm confused about the 9:49 part. isnt the V the volume of the silinder? and the density is the densiry of the water right? then how come the two of that multiplied equals the mass of the fluid?

@sebastiangottlieb1527 2 жыл бұрын

Well yeah V is the volume of the cylinder, but that also makes V the volume of the water it displaces, which is what you need to calculate

@nicholasgabaldon657 2 жыл бұрын

can someone explain to me why the change in pressure equals mg. Thanks!

@chrisklugh 6 ай бұрын

Can you explain to me why a cylinder or container that has a vacuum in it wont float? Or to put some context to it, why do we use helium to float a blimp (I get that) but we don't use an internal vacuum instead of a gas?

@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

@BB-qe1fc 3 жыл бұрын

Did u tutor at Nova Southeastern?

@treeislife93 6 жыл бұрын

Sir I have some few question about density and buoyancy force No. 1 =Is hot water more dense or cold? i think cold is more dense. No. 2 = if cold water more dense what it mean is it more buoyancy?i think cold water more buoyancy. No.3 =if cold water more dense so does it help for swimming easily? i think cold water help swimming. No.4 =is water more dense mean more buoyancy easy to float or less dense mean less buoyancy difficult to float?

@fanimeproductionst.v.3735 5 жыл бұрын

1. Cold water is denser. 2. Don't qoute me on this but I think it depends on the density of the object 3. Yes, but the increase in buoyancy is minimal 4. Again I think this depends on the object being submerged.

@mickzomer2470 3 жыл бұрын

if an object has different side surfaces (m2), does it matter for the buoyant force? I mean if you’d put a stick in the water vertically it has way less upward force than if you’d put it in horizontally. While the weight (water displacement) stays the same?

@mickzomer2470 3 жыл бұрын

@WhatTheHell AmIDoingWithMyLife but if the pressure exerted by the object changes, the pressure exerted by the water should also right? And since that’s the bouyant force, I dont get it

@primsiren1360 3 жыл бұрын

i'm confused. if the upthrust is proportional to the weight of water displaced, surely heavy objects should float because they have a high mass, and therefore a large weight. Is it to do with the volume to mass ratio?

@nosir1479 Жыл бұрын

The upthrust exerted on the object is precisely equal to the weight of water displaced. When an object is placed in water, the weight force of the object is acting against the upthrust force on the object. If you increase the mass of the object, you increase its weight, so a greater weight of the object acts against the upthrust. If the object is heavy enough, the weight of the object will be greater than the upthrust so it sinks

@alephnull6691 3 жыл бұрын

And this is known as organic chemistry.

@isaacnewton4145 2 жыл бұрын

You mentioned Fb is F2 - F1. It means F2 is greater than F1. How can FB be in the upward direction? It has to be in downward direction right? Am I missing something in interpretation 🤔

@solomondagnachew8682 2 жыл бұрын

I have no words

@hayatullah3135 5 жыл бұрын

at 5:50 why F2 is greater than F1?? any solid reason plz

@christalloidmawele5478 5 жыл бұрын

The pressure is greater at the bottom than at the top and thus a greater force.

@mistygrixti7378 Жыл бұрын

i wish teachers in my school actually knew how to teach

@batoolnetwork9699 4 жыл бұрын

@saradeek2874 4 жыл бұрын

But shouldn't F1 be greater as you go deeper? Since the amount of water above you is greater thus more pressure, please can you explain

@GPStan2157 4 жыл бұрын

F2 is greater as you go deeper because the deeper the object goes, the more force it has because the pressure is greater.

@StateOfMind_01 6 жыл бұрын

I owe you...

@sccm100 4 жыл бұрын

2:57 I hope this is not a stupid question but why does air push the block up? What about air pressure from above? and the sides?

@marwaaskar1569 4 жыл бұрын

The air pushes it both from up and down, but from down its more significant thats why Fb pushes it from down to upward direction

@sccm100 4 жыл бұрын

@@marwaaskar1569 why is it more significant from down? when it's above you doesn't it have the whole weight of the atmosphere?

@PaulTiberghien 3 жыл бұрын

@@sccm100 because compared to the point above the block there is more air above the point below. In other words, there is more weight (of the air) at the point below meaning the pressure is greater.

@bilalrahim2076 3 жыл бұрын

guys does he have a video on absolute viscosity ?

@samislami2973 3 жыл бұрын

Hi everyone,can somebody tell me is is possible to ask this guy a question,if so how do I contact him.......thanks

@learningschool9356 5 жыл бұрын

Why is the pressure on the bottom surface equal to mg/A? I get that there is a pressure on the bottom but I don’t get why it’s equal to mg/A

@mufidhmuhsin2314 4 жыл бұрын

The force acting on it is the object’s weight and weight is equal to mg. The formula for pressure is F/A. So P=mg/A

@yaweli2968 4 жыл бұрын

You Learn Education pressure is force/Area and the force is weight=mg.divide weigh by Area.

@ahmedabdelalim3810 2 жыл бұрын

i just wondering why the tension dont becomes zero because it equals the force minus weight and they are equal according archimedes principle

@michaelgonzalez9058 8 ай бұрын

Yes

@petrzenisek3667 6 жыл бұрын

Something doesn't add up. According to your diagram I thought it must mean if you have really long cylinder, it must exert larger buoyant force if it's vertical than horizontal, as if it is vertical, lower end would be deeper therefore experiencing bigger pressure. Turns out it does, but at the same time, it has smaller area than if it was horizontal so overall force is the same... by coincidence? Isn't that just super neat if you would define variable on which you would rotate that cylinder, and you would define buoyant function at every point of this variable, every time it would cancel out perfectly, that's way too clean, there must be some process in the background that I don't get. And yeah I know it just wants to be replaced by the same volume of water but that is just consequence of this calculation, not the cause. I will not be satisfied by some vague notion of sentient water that feels something is in it's way. I'm looking for deeper process like to explain why is everything falling at the same rate. According to Newton it was coincidence, that mass would cancel with inertia PERFECTLY, well Einstein found out not really, things are actually stationary and spacetime is curved - something like that.

@jimbobjr11 5 жыл бұрын

You probably cant do basic algebra so good luck becoming the next newton. 🙂

@carlosfernandez5237 4 жыл бұрын

Is there any topic that is connected to this lesson? Of course the video is good, nothing wrong but myself, I didnt understand. LOL I HAVE ONLINE FINAL EXAMINATION THIS WEEK.

@user-xz6nm1tx5h 9 ай бұрын

😇what if the a question was like this [A 10.0-kg block of metal measuring 12.0 cm, 10.0 cm and 10.0 cm is suspended from a scale and immersed in water as in Figure 1. The 12.0- cm dimension is vertical, and the top of the block is 5.00 cm below the surface of the water. Take P_atm=1.013×10^13 N/m^2 and ρ_water=10^3 kg/m^3 i. What are the forces acting on the top and on the bottom of the block ii. What is the reading of the spring scale? iii. Show that the buoyant force equals the difference between the forces at the top and bottom of the block.] how can one answer it.

@denniskoutsis4986 3 ай бұрын

well tbh im watching this since our uni teacher put in for the entirety of the course your videos and some other, i think khan academy. Im glad but i would have wanted to have a real f2f teacher....