Fluids in 1 Shot | Pressure | Buoyancy | Archimedes' Principle | Class 9 | NCERT | Sprint
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Ultra legends are watching this after 3 years
CONCEPTUAL QUESTIONS:ARCHIMEDES PRINCIPLE
1. The air exerts an upward force (buoyant force or up thrust) on our body and makes us slightly lighter than we actually are. So the weight shown on the weighing scale would be less than 42 kg .Thus we can say that our actual weight / mass will be slightly more.
2.The bag of cotton is heavier than the bar of iron. The cotton bag experiences a larger air thrust than the iron bar. Therefore, the weighing machine indicates less weight than its actual weight for the cotton bag.
3.When stones are thrown into water, the water level rises.
The density of stones is greater than that of water.
When the stones are thrown into the water, they replace the same amount of water as the stones themselves.
Hence,the water level rises......
PW student!!!
Bro but Gravitational force also exert on us, if (w=mg) then (m=w/g)
@@Vedz.Edits. yeah bro!!
3rd solution is wrong cause earlier the stone was not displacing water by its volume but by its area so when we throw the stone in water it will although make the water rise up a little but as the mass of boat will be reduced and we'll see the boat rising so we will observe fall in water level.
thankyou so much broo
bro i think that that the mass is constant
Sir, if all students find teacher like you then every student started love to study.
❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤ yes we will study regular ❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
Seriously ❤
Mostly physics.. 🎉🎉
you are a right
👍👍👍👍👍👍
2024 attendence here😂
Present
Present
absent [state- already passed]
Present 😂😂😂
Present
Legends watching this in 2024😂 39:41
Conceptual question's answer (1):- it is in reality more than 42 kg...because when we are on weighing machine, the fluid (air) exerts upward thrust on us through our foot(called buoyant force).. So the real mass - buoyant force= mass shown by weighing machine
2nd question:- because cotton has less density,,,so it'll be less heavier when compared with an iron
3rd question:- it'll remain same because when the stones were on the boat then the amount of water displaced by the mass of boat(contain man and all the stones) will equal to that of when he throw all the stones...
Dekho bhaiyaa, jab पत्थर boat mei rahega, तब वो जितनी water displace करेगा... और जब वो पत्थर फेंक देगा तो कुल मिलाकर उतना ही water displace होगा।। Kyunki boat की जितनी mass के वजह से जितनी paani बाहर निकल रही थी और उसके बाद saare stones को फेंक देने के बाद हर stone द्वारा diaplace किया हुआ water+ उस boat और इंसान के mass के द्वारा displace किया हुआ water, वो दोनो numerically तो बराबर ही होगी।
I hope smjh gye hoge😉..
Ek container mei अगर भैंस को रख कर उसका mass measure किया जाए, फिर उसने गोबर किया, और फिर भैंस का mass plus गोबर का mass दोनो मिलाकर तो भैंस का पुराना वाला mass ही आना है kyunki गोबर भैंस ने ही किया है।।। 😂 just an example
Last question's answer:- it'll sinks
Because it's density will 50/20 (density= mass/volume) as the density of water is also in g cm^3... So water density will also in g cm^3... (For simplicity).. (Waise bhi g cm^3 is a CGS UNIT) so object density= 50/20 = 2.5 g cm^3
Object density/Water density = 2.5....so it'll sink... Because it's more than 1😊
Very nice ❤❤❤
Loved it ❤❤❤
Kya copy kara h?😂
2nd galat he
As because weight is same in both the object so here density doesn't play any role
This from my point of veiw i know you have googled but ......
8:42 we can see sir's hardwork
Legends are watching this after 2 years 😂😂🙃
Me too
Same😂
@@drawwithpinks0037same
😂
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Rakshak sir is the best
No doubt
🔥🔥👍👍
Not best he is superrr 🔥🔥🔥
he is ultra Pro max legend superr not only superr
18:43 Rakshak sir OP😁😂
@@thenightking9714 over powered
EPIC
Rahul gandhi ka paryayvachi
Lmao
Basically weighing machine measure normal force.
It measure Kg-force.
Hint: weighing machine measures the amount of normal acts upon it.
In ideal situation, when we stand on a weighing machine, our weight acts downwards due to gravity, while upthrust due to air acts upwards as we as a body displace the amount of air as we stand upon the weighing machine. This upward force is the buoyant force. As a result, the body gets pushed slightly upwards, causing the weighing machine to show a reading less than the actual value. Thus, the weighing machine measures our apparent weight, which is less than the true weight. The actual mass will be more than 42 kg.
There are a lot creator explaining this but we are here watching 2 years old. Your teaching is amazing..while listening to u i started liking studies and that's just amazing❤❤
Awesome sir proud💪💪 to be a part of Phyiscwallah army😍😍
Me too
Alak sir...
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15 March
YES I WILLL
The best thing i found on youtube is pw . thnks for all the efforts u all teachers are putting to make as comprehend more..
18:41 bro has some serious personal issues with Rahul ghandi 💀
19:04 hinsa mein hum wishwas nahi rakhte
30:12 some tips and tricks
*lol*
Respected Rakshak sir ,
We all are requesting you to provide a lecture on sound. We student will be highly thankful for you.
Yo
Yes sir
N goe
The last line should be
We, the students will be highly thankful to you.
Yes bro
Give attendance those who watch after 10 for 11😂😂
😅😅😅😅
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As icse being ICSE student it is relatable but in icse there is more vast syllabus
yes bro
YES
yes you are a right
Sir ji please sound chapter bhi pada deejega gurudev apko bhi pata hai vo kitna imp chapter hai
Sound ch delete hai
Thank you sir for such an amazing explanation 😭😭
M = 50g
V = 20cm^3
S = 1g/cm^3
Relative density = density of object / density of water
SO = M/V
50/20 = 2.5g/cm^3
2.5g/cm^3 > 1 ( Sink )
bhai unit toh thik karlo
Legends are watching this in 2022😎
That means I am legend pro max because I am watching this in 2023
@@akatsuki_0_1 that means i am ultra lengend pro max because iam watching this is 2024
18:44 rahul gandhi ka paryavachi 😂😂😂😂😂😂
Wahh Kya scene hai😂😂
Agar maine Archimedes principle sahi bola toe like karna warna dislike .......karna
Archimedes principle state that when a body is immersed partially or completely in a liquid it's experiences an upthrust which is equal to the weight of the liquid displaced by it
"Rahul gandhi ka partaywachi hai" Line was epic 18:41
53:30 bhagwa⛳⛳⛳
I was searching video on "BUOYANCY" but i didn't found best teacher for explaining this but i finally found your lectures here i understood all topics .
Thank you sir😊
N search 🔍 karat raha
It should be I didn't find but you have mentioned I didn't found that is completely wrong.
Me too found it as most easy to understand and useful
Hi
Spam
15:46 legends have already imagine in their mind 🤣
Yes😂😂😂😂😅😅😅😂😂
HEHE NILLU BHAI LOL 🤣🤣!
This teacher is awesome 😎👍
Lots of love to all the teachers of physics wallah .
THANKS SIR..
This was the most doubtful ch for me.. But when I watched this video my all doubts were cleared. Thanks ~pw🤗🤗
18:45 😂😂
Sir said blunt means idiot, which is पर्यावाची of Rahul gandhi
Best part 😂😂
🤣🤣🤣🤣
😂😂😂
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Sir was absolutely right 😂
bro can't believe u guys are studying from a english medium school. Blunt does not mean idiot
Sir ,make vedio on sound chapter in detailed.
Sir..abhi mene graduation kr liyaa h fir bhi aapke competition ke liye videos dhekh rha hu...kaah jab hum 9th and 10th m hte toh ese teacher hte😔😔
Koi na
Best teacher I've ever seen . I wish he would have taught all subjects
18:43Rahul Gandhi ka paryayvachi hai
Thrust & Pressure. 3:56
Pressure in fluid. 21:25
Buoyant Force. 31:38
Archimedes Principle. 37:31
Relative Density. 47:37
Thanks
Welcome
Thanqqq
Sir bas isi ki kami thi
Bas Sound aur kara do
2) the weight of the cotton is more but it feels to be less because the upthrust force is acting more on the bag of cotton
P is inversely proportional to area, so you can say the area of cotton is more than iron. Hence the iron is heavier than cotton.
But you are ✅ Bro
I'm the legend who is watching before 2day of exam and after 2 years 😁😂🤣
Legends watching 1 day before their exam
hi sir I am your student since from class 9 and you are the best physics teacher i ever seen thankyou sir for teaching as in covid situation
18:40 📈 🛐📈
for the third one..the water level won't rise because when the stones were on the boat (which they have been from the start) the water level already rose to its maximum level then itself. No further increase in water level will occur as we are not adding these stones externally or afresh. Whether its thrown in the water or if its on the boat, the weight of the stones will be considered and thus, the level rose right from the start itself. However, if we were to just add these stones later on externally (as in, if those stones were not on the boat from the start) then the water level would have risen. So no, i feel it will remain equal.
to answer the second one...the iron bar would be heavier. This is because 100kg= wt. of iron bar= wt. of bag + cotton. Now the bag definitely has some weight of its own so if we subtract that weight from that of the total (100kg) then we will get the weight of only cotton. Weight of cotton alone would be less and thus, comparing that weight of cotton (
❤❤😊
second one the explanation is not correct the cotton is experiencing some upthrust so its mass is coming less but in real its mass is more
Sound wala bhi padha dete jivan me anand aa jata : )
Sir ji new chashma .
Ohhhhhhhh 😎🤓
PADHA DIYA NILLU BALAK !
Sir I became fan after seeing all you're videos..... Sir my all doubts and concepts are clear thank you so much sir....hats off for your lectures because it's very difficult to talk continuously for 1 hr 2 hr..... Love you sir❤❤... And your teaching way is really osm...
Thankqu betaa
❤❤
Ma 2023 ma dekha rha hi
Bhai kis company ke pankhe ban gye ho
@@OtakuHindi-uj6xj 😅
53:33 🚩🚩BHAGWA KI BAHUT DEMAND HAI
Aa gye answer dekhne 😂
Very well explained sir
Thank you so much 👍
Starting is enthusiastic ❤️🔥😎
Right
Agree !!!!
18:44 best part😂
🤣🤣
Lagends are watching before a day of exam😭😂
Factors affecting bouncy........ pls ye bhi banao video ......
1. Volume of an object
2. How much liquid is displaced by the object
3. Mg or the gravity pull acting on the object
Mindblowing sir if like u teacher will there then there will be no illetrate people in India
3) the level of the water will increase because the solid will occupy the space of water and the level of water will rise
Sir you are right numericals ke bina physics asambhav hai
The weighing machine gives output in kg and as kg is S.I unit of "mass" It's telling us our mass, because it's has a small microcontroller in it which has been programmed to gives us the mass because when we stand 🧍on it we give it mg so after calculating it's telling us our mass. So for calculating it must have to divide the value ie mg by g but the value of g varies with places so there is no constant value of g. So the weighing machine cannot give accurate mass
REALITY, WEIGHING MACHINE MEASURES NORMAL FORCE ..
Sir please explain the chapter- "Sound" also
See the playlist
@@naveedahmadkhan4448 link
18:42 😂😂
Sir when two forces acts perpendicular we need to find the resultant force which almost looks like uniform acceleration in any graph like (speed perpendicular time graph) here almost same case. And along we have to find (tan theta)
My question why we should find tangent
Didn't got ur Que
Because tan theta is =p/b and we have to do with p and b.
54:18 cm sq nahi m sq
Are aage m sq kar diye hai bhai
Sir sound bhi kra dijiye please 🙏🙏🙏
The bag of iron will be more heavier to hold as it would have less surface area in comparison to the cottons bag. Therefore irons bag would exert more pressure.
53:32❤❤
Sir in the Archimedes principle question 3 the water level will increase because the body loses its weight when immersed completely or partially the loss of weight of the body in a fluid is equal to the upthrust or the buoyant force
Upthrust or buoyant force or weight of fluid displaced by a body is equal to of body in air or weight of body in fluid
Sir you are outstanding! Very nice explanation of all the topics. Big fan of your teaching.
hw question 1
A weighing machine measures the weight of a body and is calibrated to show mass. When we stand on a weighing machine, our weight acts downwards while upthrust due to air acts upwards.
So, due to upthrust, the body appears to lose some weight. As a result, our apparent weight becomes less than the true weight. The weighing machine measures this apparent weight, and hence the mass indicated by it is less than the actual mass.
Yes🎉
Relative density
Q no 2)= we know that density=mass/volume. so density of substance= 2.5g/cm^3. now relative density=density of substance / density of water. so relative density= 2.5/1=2.5 . As relative density>1,so substance will sink.
i have a doubt... 26:00 what if the pot is filled with fine sugar particles or salt ? it will start to come out from the holes...what does it mean? maybe because solid particles are way too small in size than the hole ?
Solids are rigid, not fluid. Only fluids exerts pressure on the walls of their container.
Very well explained sir 👍
Thank you so much 🎉💞
Sir Thanku so much for this video because in 2022_23 the Syalllbus are not reduced so this very useful.
Thanku once again. 🙏
❤❤
Why
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(18:41) That Rahul Gandhi ka paryavachi h was epic ;)
Usse agla bhi mst tha... Hm hinsa m vishwas ni rkhte 😅
Well we have already been taught the concept of vector perpendiculars
Yeah in ICSE board we study this in 9th itself
And me from icse still here😂😂
@@aradhyashakya2777lmao, m in 10th now
Sir meri ek request hai kya app ab jo 10th ke liye batch shuru karoge toh kya aap usme olympiad level ko aur aache se touch karoge......
Please if you agree..So
That sir can see this comment and give their attention on this.
Thank you🙏
Clapping before watching.... promo says it all 👏👏👏👏👏👏🙏🙏🙏
25:52 - "Matke ke sath ched chad karega, aunty ke sath nahi" 😂😂
1:00:12 - 3 question
The water will Rise because the stones have volume which is displacing water's volume.
Nhi dildeewane bhai water ka jo level hai wo same rhega q ki Pani ke upar nao aur nao ke uper patthar to patthar ka volume v to nao mai add hua issi liye agar hamlog patthar ko Lake mai dalenge to nao ka to force ghat jayega agar hamlog bahar se patthar fekte to bhale bol skte thhe ki Pani ka volume rise karega
Sir, sound chapter vi kra dijiye please 🙏🙏🙏🙏
Sir, sound chapter please........ 🙏🙏🙏🙏🙏😊😊😊😊🙏😊🙏😊🙏😊🙏😊🙏😊🔊🔊🔊🔊🔊
Isi tarah daldal me jab ham khade hote hai to jaldi doobte hai aur jab let kar nikalne ki koshish karte hai to pressure Kam lagta hai aur ham bahar nikal sakte hai
38:52 is the funniest time😂
2:57 that pawrii ho ri hai scene😂😂
Ans.1 weight is more because external force is applied. Ans.2 It is more. Ans.3 Water rises up
YOU MAKE THE CHAPTER SO EASY AS A SIMPLE WAY
Dislikers are come from unacademy😂🤣🤣
yes
@@Xyzabc-ly2im bro hiii
Bhai English ki ma behen mat kar
@@Kirti_Negi Khan sir has no issue with pw
@@tejasnayak5283 Are bhai Khan academy doosri company hai, international company hai, India mein bhi hai..
Stone has some volume and according to Archimedes principle volume of the stone = the weight of the displaced water . Therefore the level of water will rise surely
but wont the volume still be present when the stone is in the boat, if thats the case the level wont rise
1.Weight is depicted less due to atmospheric pressure of about 200,000N acting on our body of roughly area 2m^2
2.Weight of both should have been same due mass being equal but volume of cotton will be more therefore atmospheric pressure acting on it will be more.
3.Yes, due to the pond being an enclosed area, no. of heavy stones being thrown would result in an increase in level of the water.
bro how would the level increase as when u were sitting on the boat you stiil had the mass of stones and when u throw them the water level will not rise
55:53 is the best part🤣🤣🤣
sir aapne baataaya ki area jaada hogaa to pressure kmm hogaa isliye hi oot registan mai chaal paaataa hai to kya hathi registaan mai chal saktaa hai
Ha chl skta h
18:44
you are right siir😂😂😅
We r proud to being taught from u ...... without cost this is a nice platform.......I salute PHYSICAL WALLAH !!
Its phyics wallah not physical wallah
Yeah ! Lol ones ....
Thankyou sir your teaching method is excellent ❤ again thnks sir ......
18:40 sir literally roasted rahul gandhi
🤣🤣🤣
18:45
Le rahul gandhi : gajab beizzati hai
Physics jalwa 😉😉😉😉😉
58:22
Sir loha bhari hai😊
Agar ham cotton kisi ke sir pe maren toh kuch nahi hoga😅
Agar loha kisi ke sir pe maren too........ 😂😂
1)the weight is less because upthrust is acting on it.
Hw Q1) weight is shown less on the machine
Reasoning: air is a fluid and exerts pressure while the gravity of the earth acts on us. This causes upthrust and leads to lossing in the weight on the machine
Q2) iron
reasoning air particles are tightly packed in iron and has no air spaces and as a result is more dense than cotton. This leads the iron to hv more weight.
Q3) the level of water will rise
Reasoning: stones are heavier than water and sink. So according to archimedes' principle the level rises.
Sir please tell if the answer is correct
Comment by Aadya Singh class 7
And sir your sessions are always amazing thank you so much for putting so much effort for making us understand
The pressure exerts in cotton is more because of densile in class 11th you will understand it better of also directly proportional to it's surface area - area or volume..., 2nd one be the density mass of the volume (cubed).
No it is wrong
Q no 2 wrong answer
70 views 80 likes 🙄😳😳😹😹
power of Rakshak sir