Force and Pressure | Full Chapter Revision under 30 mins | Class 8 Science

[@KunalSharma-hc2px]

Ans is Camels can walk easily in the desert because of their wide feet. Their wide feet allow the weight of their body to act on a larger surface of land reducing the pressure exerted on the land by the camel. As we know, pressure exerted and area are inversely proportional.

[@aryamankaushik6864]

in the first question: It is more difficult for the horse to walk in the sand because its feet are not broad as that of a camel. Which means less surface area, and pressure exerted on the sand is more hence the feet of the horse going inside the sand. Q-2) B 12.5:1 Hint to those who are solving: An elephant has 4 feet not 1.

[@vedaboiplaying2902]

It is 6.25:1

[@sunilporwal5474]

No its 6.25:1 To compare the pressure exerted by the girl and the elephant, we can use the formula for pressure: Pressure (P) = Force (F) / Area (A) First, let's calculate the pressure exerted by the girl: Girl's weight (Force, F1) = 50 kgf Area of her sandals (Area, A1) = 1 cm² = 0.0001 m² (since 1 cm² = 0.0001 m²) Now, calculate the pressure exerted by the girl: Pressure by girl (P1) = F1 / A F1/A1 Pressure by girl = 50 kgf/0.0001 m² = 500,000 kgf/m² Now, let's calculate the pressure exerted by the elephant: Elephant's weight (Force, F2) = 2000 kgf Area of each elephant foot (Area, A2) = 250 cm² = 0.025 m² (since 1 cm² = 0.0001 m²) Now, calculate the pressure exerted by the elephant: Pressure by elephant (P2) = F2/A2 Pressure by elephant = 2000 kgf / 0.025 m² = 80,000 kgf/m² Comparing the two pressures: Pressure by girl (P1) = 500,000 kgf/m² Pressure by elephant (P2) = 80,000 kgf/m² 500000/80000=6.25/1

[@goelbeena]

@vedaboiplaying2902 and @sunilporwal5474 you both are wrong it's 12.5:1 As I calculated and girl exerted 250,000(Pa) and elephant exerts 20,000(Pa) So it's 12.5 : 1

[@Artsmosphere]

hi byjus, please bring sst for class 8 also like this

[@PQR-1234]

THANKYOU SIR FOR BRINGING THIS SESSION FOR US!.. THIS CHAPTER IS COMING IN MY ANNUAL EXAMINATION ALSO!.... 😊😊

[@amarnathtiwari2538]

XXX you are

[@Funtoontv-m5ik]

​@@amarnathtiwari2538 xxx what is this

[@randomguy-nx8rx]

12:39 homework question answer (a) since the formula of pressure is f/a then the pressure exerted by the girl = 50/1 (applied force of 50 and area of 1) which is 50 pascals then pressure exerted by elephant = 2000/250 which is 200/25 which is 8 pascals ratio = 50:8 which can be represented as 50/8 which is 25/4 which can be written as 6.25:1

[@Mk_mill]

Hey, the answer is 12.5 : 1 The elephant has 4 legs not 1

[@Da-lj6ol]

Bruther.....first of all SI Unit of pressure is Newton/msq and not Newton/cmsq so first you need to convert the cmsq into msq and then divide it by newtons.... second of all...the elephant has 4 legs and not 1 and the girl has 2 legs and not 1 so the answer would be 12.5:1

[@randomguy-nx8rx]

my bad

[@Da-lj6ol]

@@randomguy-nx8rx u still exist over here????i thought no one would c my comment....lol

[@ShivaniSreedhar]

Wrong, you didn't convert the cm² to m². You must do that because the unit measurement of area is m²

[@YashikaSolanki-nm5cc]

IT IS EASIER FOR A CAMEL TO MOVE ON SAND THAN HORSE BECAUSE CAMEL HAS BROAD FEET HENCE LARGE AREA SO PRESSURE EXERTED WILL BE LESS

[@RouhanKhan-rf7cp]

Q1( b) 12.5 : 1 , Q2/ Ans The horse is unable to walk on the desert because it's feets have small area that exerts more pressure,but a camel walks easily on desert because it's feets are broad that increases area because of this pressure is low that is why camel walks easily in desert and not gets inside the sand .

[@shauryadhanekar]

11:24 Answer: the camels 🐫has large foot then horse 🐎 so they can walk on sand because the ptessure will be distributed on the sand but in the case of horse they have shor foot so they can stuck in the sand

[@Priya_sharma49]

Hello sir thank you for this chapter and homework answer is :- 1. camels have broad feet than horse though which they can run easily while horses have solid feet so they sink easily in desert. 2. The ratio is 12.5 : 1 If there is any mistake please tell me sir 😅

[@KAVITAKUMARI-vy6wr]

yes ans of second question is 6.25 : 1

[@KaavyaAgarwal-w3j]

No it's right

[@GeetaMishra-yc9kb]

No the answer is 6.25:1❤

[@KaavyaAgarwal-w3j]

@@GeetaMishra-yc9kb Ok then explain

[@vedaboiplaying2902]

​@GeetaMishra-yc9kb ✅✅✅✅✅✅✅✅✅ correct

[@nagmatabassum8121]

6:51 epic scene.......🤌🏻😅

[@atainakhan3211]

Force and Pressure ❖ The force that acts on a surface in a direction perpendicular to it, is known as thrust. Pressure ❖ Thrust per unit area is called pressure. So, pressure = force/area on which it acts. ❖ Liquids exert pressure on the walls of the container in which they are kept. ❖ Gases exert pressure in all directions. Electrostatic Force ❖ A force exerted by a charged body on another charged or uncharged body is known as electrostatic force. ❖ Atmospheric pressure is defined as the pressure exerted on a surface by the weight of air above that surface. Atmospheric Pressure ❖ The pressure exerted by atmospheric air around us is known as atmospheric pressure. Contact Force ❖ A force that can be applied only when it is in contact with an object is called a contact force. For example, hammering a nail. Electrostatic Force ❖ When a charged body, either having a (+) or (-) charge, exerts force on another charged or uncharged body, that force is known as electrostatic force. Force ❖ Simply a push or pull exerted by an object on another is a force. Friction ❖ The force of friction always acts on all the moving objects and its direction is always opposite to the direction of motion. Gravitational Force ❖ The force exerted by the earth to pull the objects towards itself is called the force of gravity. Gravity ❖ Every object in the universe, whether small or large, exerts a force on every other object. This force is called the force of gravity or just gravity. Magnetic Force ❖ The force exerted by a magnet to pull/push a metallic object is called magnetic force. Muscular Force ❖ The force resulting due to the action of muscles is known as muscular force. For example, writing, cutting vegetables. Non-Contact Forces ❖ A force that can be applied without any contact between two objects is called non-contact force. For example, the magnet pulls the iron-pieces. Pressure ❖ The force acting on per unit area, applied to an object in the direction perpendicular to the surface is called pressure.

[@Aazak_Drawz]

Full essay 😂

[@YashikaSolanki-nm5cc]

VERY NICE SESSION I LIKE THESE TYPE OF SESSIONS MY EXAMS R FROM 28 FEB TO 11 MAR I ALSO WANT EXEMPLER QUESTION SIR THANK U SOOOO MUCH.....!

[@Kingeadly2023]

11:20 Because the camel has broader feet than of horse which increases area on sand due to which the preasure is decreased and it doesn't sink in it. Am I right?

[@sanskritigupta1197]

Homework question answer Option a 6.25:1 Solution - Pressure = trust ------------ Area Case 1 Girl- trust = 50N Area = 1cm2 Case - 2 Elephant - trust 2000N Area - 250cm2 = 8 . . . 50 ------- 8 = 6.25:1 ans

[@UniqueAlucard]

it is 12.5/2 because girl has 2 legs and elephanthas 4 not 1

[@sangitasharma72554]

6:48 is the most funny he does not have hair ...😂 But i swear these are the best summary of the chapters my mam can literally not explain an chapter in 40 min but this channel can explain explain everything in just 20 to 30 mins ... A big thankies ✨🥺❤️‍🩹🫶

[@KunalSharma-hc2px]

What you're solving for The ratio of pressure exerted by the girl to that by the elephant. What's given in the problem The girl weighs 50 N The girl wears pencil heels sandals each of area 1cm square The elephant weighs 2000N The elephant stands on foot each of area 250cm square How to solve Calculate the pressure exerted by the girl and the elephant, then divide the pressure exerted by the girl by the pressure exerted by the elephant. Step 1 Calculate the pressure exerted by the girl. Pressure =force upon area Pressure = 50 N upon 1cm square Pressure = 50N/cm square Step 2 Calculate the pressure exerted by the elephant. Pressure = Force upon Area Pressure = 2000N upon 250cm square Pressure = 8N/cm square Step 3 Divide the pressure exerted by the girl by the pressure exerted by the elephant. 50N/cm square upon 8N/cm square = 6.25 Solution The ratio of pressure exerted by the girl to that by the elephant is 6.25.

[@fardheennissar]

this is completely wrong. Read the question properly. The girl is wearing pencil heel sandals EACH of 1cm^2 area. So the total area will be 2cm^2. Hence pressure exerted by the girl will be 25 N/cm^2. The elephant stands on feet EACH of 250 cm^2. So the total area will be 1000cm^2 (because the elephant has 4 feet). Hence pressure exerted by the elephant will be 2 N/cm^2. ratio will be 25:2, or 12.5:1

[@SarojBala-p4d]

Bro both are wrong firstly we have to convert cm² into m²

[@fardheennissar]

@@SarojBala-p4d that’s not needed.

[@reenavihariya8281]

Ya

[@shawpremjit]

Not necessary as pressure is force upon area and is independent of the units thus even if we ta ke m2 instead the ans will be the same

[@naziyabegam5689]

Because horse legs are so short but camel legs are so much longer than horse and in deserts attract the people in the soil

[@learwithindia]

3:50 sir if the bottle is made up of steel when 😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂🎉😂🎉🎉😅😂😅😂😅😂😅😅😅😅😅

[@nagmatabassum8121]

11:19 because camel have wide feet means the area is more it's divided the pressure where as horse feet have less area means more pressure so, that's why camel can walk easily in desert than horse

[@mohammadumar9631]

11:24 😂

[@swapnaputtapalli5622]

The correct answer of second question is 25 is to 1 because The elephant has four foots each is 250cmsquare for 4 ft it is 1000 CM Show the pressure of elephant is 2000 by 1000 which the pressure is 2. The girls pressure is 50 / 1 which is equals to 50 50 /2 which is equals to 25 is to 1

[@ShivaniSreedhar]

U have to convert cm² to m²

[@RaniDevi-i7e5d]

Sir resultant force and net force both are same??

[@sanskritigupta1197]

It is difficult for a horse to walk in the desert than a camel because the area of the camal's feet is bigger than horse so pressure will be less in camals feet than horse and his feet will not sink in the sand and camal can walk comfortably on sand

[@SainathYaragal]

10:35 who is ravi sir?😂

[@GeetaMishra-yc9kb]

Sir said "abhi" not "Ravi" ❤

[@brajesh0206]

BRO YOU ARE LIKE THE BEST TEACHER. I CANT UNDERSTAND HINDI AND THERE YOU ARE,EVEN THOUGH YOU TALKED A LITTLE BIT HINDI. BRO I UNDERSTOOD EVERYTHING THANK YOU,THANK YOU,THANK YOU,THANK YOU, THANK YOU X10000000000000

[@Falaahari]

Ans is camel is having bigger feet than a horse which means the area of contact is more because the area of contact is more the pressure will be less. Horse's feet are smaller than that of a camel which means that area is less so pressure will be more thus the feet of the horse will go inside the sand

[@sahib533]

We use camels rather than horses as horse have small feet and exert more Pressure on sand hence they can't be used in deserts as they can't move while horses have padded feet which allow them to exert less pressure on sand

[@NishaMahendra-t5t]

Camels hooves have more area than the hooves of horses. So the pressure acts on the horse's hooves more than the camel's hooves, resulting in the sinking of the horse, making it difficult to walk

[@AnimeStarAnsh]

it is because camels have padded and broad feet which decreases the pressure acting upon the surface of the feet of the camel and the sand present in the desert.

[@Learntailoringwithafrana]

Hi 2nd comment Byjus you are just wonderful you help a lot of young learners on this platform 🤠 hats of to you ❤🔥🔥

[@Vishakha_singh077]

3rd comment...and excited for this class...❤

[@aarush_yadav_717]

Hii princess

[@Sureshpatel-mq6cz]

5:17interection ies there?

[@Sureshpatel-mq6cz]

*is

[@Sureshpatel-mq6cz]

*is

[@KunalSharma-hc2px]

In the topic of muscular force on 4:26 sir showing his body💪🏻 😂😂

[@AldrinTheoJosephSchool]

11:14 we use horses

[@kavyaonish5519]

Camel is walk on the sand easily because the first reason I can say that they were say that there were camel those have habits to walk on the sand and the horse have habit on the land and the second and important reason that the camel have wide legs compare to the horse. 😊

[@Sanx_Ed_18]

0:03 ❤

[@AldrinTheoJosephSchool]

15:27 honey will not flow it is too thick

[@chilledpartner]

20:57 😊😊 hi

[@Anshu-ft6fi]

12:30 answer a)6.25:1

[@Editz-by_2009]

One like for our SIR 👇

[@Editz-by_2009]

I liked my own comment 😂😂

[@leenatulshan]

Ans to your Que. - Horse doesn't have much wider foot as compared to that of camels. Thus, horse experiences more pressure and can not walk properly with heavy loads on their back...

[@choudharyanmol260]

It is difficult for a horse to walk in a dessert as compared to camel because foots of camels have big surface area than horse so the pressure of land will be less to it’s foot

[@shashikantsingh5315]

ans sir the camelhas large hooves which reduce the pressure but horse has small hooves which increse the pressure acted upon and the horse will sink down because the are is inversely propotional

[@kamarneesashaik6020]

19:03 WHY😊

[@AbhishekSingh-lc9ji]

Sir the horse 🐎 legs area is having less area which goes inside the sand and presure is high and the camels🐫 have big foot which have less pressure

[@Errorx_x17]

Video starts at 1:19

[@YG_Edits0]

Thank you sir 😊

[@PranavSrivatsa-h8r]

The feet of the horse are small which causes more pressure while the horse is loaded whereas the camel leg has more surface are causes less pressure.

[@sonujaiman9166]

28 March se kis kis ke tension start ho Rahi h RBSC Wale best of luck

[@allinon618]

My tension❤❤❤

[@kumaraswamytr4895]

Bro said under 30 min but finished in 20 min

[@kojiclipzx]

1:47 💀💀

[@bp4442]

Fr i thought i was the only person who was thinking dirty in the whole video......

[@malliswaripunganur1097]

Thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you very much sir 🙏 way was I understand very well sir 😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃

[@Editz-by_2009]

12:19 Homework question : The 1cm'2 will be 2cm 50/2=25 So,only one option have 25 ,simple logic option (D)

[@ayushkumar6440]

😂

[@abhaycreative01]

19:40

[@Dangerousarmy-g7g]

KZbin per subscribe nahi hai mere why? Please answer the my question ❓

[@trivanimaheshwari-y4]

Camel walking easily on sand because the foot of the camel is wide os if the area is large so the pressure exerter would be less and this is why hose is not because the foot is small of horse so pressure is high 😊

[@justborntoplaygames]

1:22 starts video

[@monamannat5007]

Thankyou sir for today's session

[@rahulmoredrawings5565]

Horse faces problem in walking on sand because it's hooves are not wide . In case of camel it vice versa.

[@Prishaaaa1910]

6:52 😂😂

[@SarojBala-p4d]

Bcz the camels have large and flat feet so the area is larger and force is smaller so it does not sink in the sand

[@Pichai1111]

7:24

[@urvashibebo5450]

Thank you so much sir tomorrow is my exam and it will definitely help me alot 💗✨🥹

[@manya-s9u]

Yes 9:35 9:38 9:39 9:40

[@PQR-1234]

1st comment ❤❤

[@YashYadav-fk6bg]

12:52 d

[@Anesthetic_life_art442]

Thanks sir the video was really helpful 😊

[@shadowgaming2702]

I still watching this video more than 2 time

[@RouhanKhan-rf7cp]

Keep it up bro 😂😂

[@shadowgaming2702]

@@RouhanKhan-rf7cp thanks

[@KrishnamurthyKRKrishnamu-eb6uh]

👍🏼👍🏻👍👌 tanku

[@JishaSandeepkumar]

But good class.. Sir i liked it🎉

[@swarajinglevc3775]

❤❤

[@shawpremjit]

becaus ecamels have broader feet than horse tus area of contact is more so pressure is less thus they can walk easily without sinking

[@JishaSandeepkumar]

Please... Also explain in Malayalam.. Okk... Kerela students are also leaving in india.. Like adi..

[@AGZ_YAHIKO]

True watching for exam 😂

[@ArionChaturvedi]

Yea you write the exam in mallayalm only ok?, and in that case they will have to make a video in every language because ppl from every state are also 'living'

[@utpalmukherjee9137]

Please tell me the correct answer of elephant and pencil related question .

[@priyanshiandparthshow]

Q1(b)6.25:1

[@jr7gaming562]

Wrong

[@naughtykittugupta8711]

Ans for the question is 6.25:1 (a)

[@gwanmol8573]

Shi hai bhai

[@adwaithmadhav3762]

weight(force) of the girl =50 N area = 1cm^2 = 0.0001m^2 pressure = 50/0.0001 = 500000 pascals weight(force) of the elephant = 2000 N area = 250cm^2 = 0.025m^2 pressure = 2000/0.025 = 80000 pascals Ans = 500000:80000 = 6.25:1

[@Badra-l7f]

Sosc form fill Kiya tha kya

[@Sanx_Ed_18]

6:53 I'm not doing it because ☠

[@arunakela3565]

😂 8:21 😂

[@SainathYaragal]

Sir pressure and area are invesly proportional

[@BaPhometmc1777]

6:49 but you can do 😅

[@aayushtyagi3587]

19:16 for some student use hindi sir because this past is important

[@rkpsrm8960]

Please don't talk in hindi pleaseeeeeeee

[@ishanmathpati1421]

Camel has long padded feet so the area is higher and pressure is lower

[@CrickyEdits]

Agar tum hindi me nahi bol rahe ho to ham isse accha dusri english ki hi video dekhle Tum yeh english bol kar show off mat karo sikhane aaye ho to dhang se sikhaao Isiliye views nahi aate 💀

[@asc.z]

bhai school ja kar padh na phir

[@lolaeditsss4140]

Bhai sidha sidha Bol tujhe English nhi aa rhi 💀

[@asc.z]

@@lolaeditsss4140 frf4

[@Alishamolla09733]

Please sir can you tell me about what the business coach is going on now

[@santoshverma1401]

Nice explanation sir

[@Speedwagonishere]

sir ne electrostatic ka example mann se nahi force se kiya kyunki vo kar ni paate

[@SunitaVader]

Sir very good 😊

[@NipunGupta-tc8nv]

wonderful!

[@ManmohanSingh-ot5cl]

A) 6.25:1

[@jr7gaming562]

Wrong

[@learnmathswithaditya]

Anyone in 2025

[@shivamop7044]

Kuch samaj nahi aya kal paper hai

[@JHETALAL5]

Mujhe bhi

[@Vivanmodak22]

Sir can you please make video for class 9th 🙏

[@GeetaMishra-yc9kb]

12.49 answer 👉6.25:1❤

[@Anshu-ft6fi]

U r ryt

[@pokefan_official.]

Hello sir❤❤

[@SamyakMysoreHitsH12345]

Sir aapne exam ka tension choor choor kardiya😅😅🎉🎉🎉❤❤😊😊😊

[@IndianArmy-fan410]

Force:pull and push

[@nirmalarathi2525]

because camel foot area is more so pressure will be less whereas horse foot area is short thus pressure will be more and ques 2 answer will be b 12.5:1

[@JishaSandeepkumar]

And i can't see any worksheets... 😑

[@Siddharthgamingofficial29]

Thanks sir

[@shashikantsingh5315]

homework answer : 6.25: 1