Friction in One Shot | Physics - Class 8th | Umang | Physics Wallah

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▶️Complete CLASS 8TH - SCIENCE ONE SHOT Lectures - • Science - Class 8th NCERT
In this lecture of Umang batch, Alok sir is going to teach you the chapter Friction.
Topics covered in this lecture are-
•Force of friction
•Factors affecting friction
•Friction: A Necessary evil
•Increasing and reducing friction
•Fluid friction
There are many other important chapters that we are going to cover in upcoming videos for class 8. Stay tuned with PhysicsWallah Foundation.
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• Recorded Lectures for Class 8th Students.
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🎦 Eight Lectures per week will be uploaded.
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#Science #Class8 #Umang

[@RishabhSontakke-ed4ke]

Kon kon half yearly ka paper ka liya dekha Raha hai😅

[@pranitachoudhury402]

Humm😂😂

[@pranitachoudhury402]

In which school you are studying? 14:19

[@pushpajoshi5236]

Me bhi 😂😂😅

[@Vanshtyagi47]

Millennium public school merrut

[@aesth_beauty007]

Mai bhi 😅😅😅

[@GloriousPurpose-yq9vo]

1.(b) Motion 2. (B) Smaller 3. (B) Decreases 6. Rohan fall because banana peel was smooth and his shoes grip wasn't good enough the peel reduce the friction much. Pov:- keele ka chhilka nhi pheekna chahiye aur ghisi hui chapal bhi nhi pehni chahiye 😂

[@Seamless-ff]

fr

[@Itz_Akshra_.]

😊😊

[@abhiramkumar1887]

Itne Gyan ke liye dhanyawaad

[@Seamless-ff]

@@abhiramkumar1887 hi

[@Jsaweirdo-19]

Frfr

[@nxgdeathyt8968]

How many legends are watching this before a day of exam😂😂😂

[@_POONAMGUPTA77779.]

Nice tomorrow is my s.c exam

[@divyansutkarsh8395]

Me

[@ReshmaNale-v9x]

Me🙋‍♀️

[@opsobhit4584]

Me also

[@omprakashthakur8046]

Me also

[@FocalLens-hk6tj]

As a senior of CLASS 11TH PLEASE FOCUS. BASICS SHOULD BE CLEARED FOR MOVING FORWARD.

[@sangeetasaini3930]

Aaccha

[@FocalLens-hk6tj]

@@sangeetasaini3930 You will eventually realise it by yourself.

[@Xerox_ff.]

okk bhaiya

[@sakura-Uchiha-i80]

Okay bhaiya♡

[@ars7016]

Kon kon 2024 me dekhne aaya h😂😂😂😂😂

[@saksham-te3fh]

Same

[@AbhinavBhArt]

The legend is here

[@AbhinavBhArt]

​@@saksham-te3fh😂😂😂 me raat ke 12:00 am me 😂😂

[@AbhinavBhArt]

​@@saksham-te3fhwhere are u from bro

[@saksham-te3fh]

@@ars7016 jammu and kashmir

[@AniketChaurasiya-rr1fl]

Who is watching this video after winning of India in the T20 match 2024

[@SonuYadav-7777]

Yes bro 😂😂

[@AniketChaurasiya-rr1fl]

@@SonuYadav-7777 hello bro

[@kingkohli-k3i]

yaaa bro

[@abhiramkumar1887]

Present sir!

[@artcraziness4254]

Answers 1. Motion 2. Smaller 3. Decreases Thank u sir for the amazing lecture

[@Musicwith-peace]

1, motion 2,Rough surface exerts more motion 3, smaller 4,decreases 5, pull Thank you so much sir❤

[@Apramya_10]

Q1-(b)-motion Q2-rough surface Q3-(b)-smaller Q4-(b)-decreases Q5-pull Q6-Rohan fall because banana peel is smooth and his shoes where not able to make grip and the banana peel reduces the friction.

[@rajkumari-rf3gn]

🙏

[@ffarpitgamers8385]

😂 😂😂😂😂😂😂😂😂

[@sevencolorsofrainbow7353]

😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂

[@AdityaSharma-hm4eq]

question to teen hi the

[@shreyashtathe9875]

Like for these answer 👇

[@kakashi45325]

Q1-motion Q2-rough surface Q3-smaller Q4-decreases Q5-pull force

[@gameruchiha4077]

Rohan falls on the ground by banana peel because : 1. the surface of the banana peel is smooth which reduces the friction between his foot and ground . 2. the irregularities of the surface was filled up by the banana peel making it more fiction less.

[@YashKumar-f7o]

😂😂😂😂😂🎉😂🎉😂😂 yes

[@bobbyharoon6440]

Not worry about your exams , dont look at time every time you study and think you are running out of it , you have to remember that have you to understand the chapter well for your exams not for just completing syllabus because if you study in haste you still wont understand the topic

[@swekshakathil3282]

Rohan 'fell' because of sliding friction in the surface the bannana pelled and just like when you spread powder in carrom board the rough surface became smooth for a specific time and the surface in which Rohan was standing was also became smooth because of bannana and Rohan fell

[@anuarora-hk7st]

the friction reduced due to smooth surface

[@blackdevilofficial64]

How many people watching in night like me

[@kumarimuskan3776]

1.Motion (B) 2.Smaller (B) 3. Decreases (B) Thanku sir.💙💙

[@non-stopstruggle578]

Oomfo thanku

[@MayankKumar-fi3kf]

Hii

[@darmusabir5898]

I love ❤you

[@Soumya_pw4]

Awesome sir ji 🤩🤩🤩

[@umangop]

Hey

[@rajulohni55]

Motion ka sir ji ❤❤

[@KING_GAME_PLAYER]

15:05 motion

[@Crystal_shine550]

15:49 motion 18:09 we should apply more force on rough surface 35:46 smaller 50:00 decreases

[@royalfamily7831]

😂😂

[@geetachauhan9438]

​@@royalfamily7831why the hell you are laughing...😑

[@ombajpai2747]

Motion

[@ASMR_Reviews759]

15:5 motion

[@s2hgaming680]

That's like a style of teaching💯

[@Sammy-pc1wf]

True✨🙃

[@study6591]

No

[@leelaphadisangeet]

Yes😊😊😊

[@indianvlogger-c3c]

@@Sammy-pc1wf thanks

[@indianvlogger-c3c]

@@study6591 but how

[@dad_dk_ffx]

15:05 (b) motion 35:22 (b) smaller 50:15 (b) decreases

[@zankox5948]

Bhai Tara b wala answer galt ha greater ho na cahiya

[@zankox5948]

Bhai Tera c wala bhi galat ha a ho na cahiya

[@lyyxiaaa]

18:04 Rough surface needs more force to be applied. Ans 1. Motion Ans 2. Smaller Ans 3. Decreases Rohan slipped because of sliding friction, as the banana peel is slippery.

[@chitralekhasingh3425]

Yaa ! Your answer is right

[@raja4kstatus816]

Qno.1 a ans

[@santoshkumarsantosh2080]

Motion is right

[@lyyxiaaa]

@@chitralekhasingh3425 tysm💜

[@p.ksingh6258]

Sir rough surface pr jyada force lgega 1 ; Motion

[@REYANSHZ_EDITS]

THANK YOU SIR FOR GOOD EXPLANATION :):):):):>:>:> ANSWERS OF THE FOLLOWING QUESTIONS ARE AS FOLLOWS:- 1. (B) MOTION 2. (B) SMALLER 3. (B) DECREASES THE CHILD(OUR FRIEND) IS PULLING THE BAG.

[@MsSumanjanu]

Oh very nice brooooooooooo

[@MsSumanjanu]

I think you are topper ☺️☺️☺️🙂🤔🤔🤔🤔🧐

[@aashnamorwal2583]

1. - Motion 2. - Smaller 3. - Decreases Thankyou sir for the amazing lecture 😊

[@wefamegame4942]

Correct ✅✔

[@GauravKumar-mk6qs]

motion

[@adityaparmar6573]

2. Motion Is the answer

[@superboyprince7786]

1. Motion 2. Smaller 3. Decrease And rohan is slide because there, the friction is decrease because the surface of banana is smooth

[@ayushrajhans1503]

with very less irregularities

[@SR.respect1m]

Wrong hai greater hoga

[@gamingakdey5723]

Q1)..(b) motion Q2)...rough surface Q3)....(b) smaller Q4)...(b) decreases Q5) pull

[@ankita1065]

1.Motion 2.Rough surface exerts more motion 4.Smaller 5.Decreases

[@divyanshyt8062]

Bro 1 2 and 4 not 3😂😂😂

[@sameerahassan-dh9ti]

Motion

[@Aditi.1994]

Q1 answer= Motion Q2 answer= Smaller Q3 anwer= Decrease The answer of case is= when rohan step on banana peel he applied some force on it but the surface is plane that's why he fall because there is less irregularity and less interlocking between them 😊. Thank you for teaching 😊👍👍

[@divine3778]

Thanks

[@mrs.urmilapatidar5367]

15:26 motion 18:06 rough surface exert more motion 35:39 smaller 49:56 decreases

[@kingofthegames3629]

Motion

[@Navi267]

Q-1 Answer is motion ❤ Q-2 Answer is smaller ❤ Q-3 Answer is Increases❤

[@Xesth_7495]

Q-3 decreases

[@Navi267]

@@Xesth_7495 NO Inserese

[@Navi267]

Increase hoga sahi answer

[@AK_HARELIYA]

1:04:13 because the kele ka chilka was a lubricant it reduced the friction between 2 surfaces resulted in R I P of Rohan

[@tiwaryyy__5]

😁mara nhi

[@mohikamathur2417]

Stage 1 question's Answer - (b) Motion Stage 2 - (b ) smaller Stage 3 - ( b) descreases

[@CHAMP99X]

R. I. P. for that guy 39:45 ,struggling to Walk 😂

[@MohdAmir-ci7pp]

Q1-(b) motion Q2- rough surface Q3-(b) smaller Q4-(b) decreases Q5- pull Thanks sir for tell me.........

[@gurdevsingh4770]

Rohan fell because the surface of banana peel was smooth and there was less friction due to less interlocking of hills and valleys. And the friction applied there was sliding friction

[@nashra33337]

😢😢

[@Reactjokes]

Achaa😂

[@Shuu137]

Yrr kaisee😢

[@matlabiduniya339]

High friction

[@SHAHMOHD-f5v]

❤❤❤❤

[@kirtisharma9699]

15:05 - motion 35:29 - smaller 49:53 - decrease 52:00 - pull

[@ishaan4049]

Answer 1 is wrong as it also produce heat for eg rub ur hand faster and u will see motion and ur hand will be warm

[@B2-BAD]

Example - Matchstick

[@Krishna_91]

15:05 - b) Motion 18:06 - rough surface exert more motion. 35:29 - c) Smaller 49:53 - b) Decrease Rohan falls on the ground by banana peel because it is Slippy which makes the object smooth and on smooth object friction decrease due to less irregularities and less interlocking.

[@Poornanshplayzz7]

Thanks❤

[@PremshilaDevi-rr9mg]

Motion Rahul went to the stairs and landing on the way by the flow of sand

[@rp-randompro5176]

@@Poornanshplayzz7 Thank u bro

[@joymishra6138]

15:08. Motion

[@archanasaxena9839]

1. Motion 2. Smaller 3. Decreases 4. Rohan felt because lack of friction, and the banana peel is very smooth and ther is no irregularities due to less irregularities the rohan felt. Thanks sir, The session was amazing.

[@Asifa-c8u]

Rohan fell*

[@bestgemers7895]

1-motion

[@kamleshkumargupta1824]

Decreases

[@mamatabehera8362]

15:02 B motion 35:27 B smaller 50:18 B decreases -Rohan fall down when step on the banana peel because the banana peel is smooth and have friction on its less that he doesn't gets grip to stand.

[@nirmitbaria4155]

Investigation Result - Rohan fell because when he stepped over the banana peel the friction between the banana peel and the surface became less because the banana peel has a smooth surface.

[@RehamanKhan-pd4ow]

Good boy😅😅

[@aloneboy-tn4jr]

Sir you are the best teacher🎉❤😊

[@ishikasuniverse3137]

sir when we walk on a path . in which direction the friction works ? and when we walk in back ward direction .in which direction friction works?

[@ramakrishnaallu4292]

Frrf🎉😊😅😅😮😮😅😊😊😊😮😢😢😢

[@rupadeb9164]

Next level explanation❤❤❤

[@LaxmiSingh-tq5bx]

Thanks sir ❤ 1. Motion 2.smaller 3.decreases

[@ShikharAasal]

Rohan fell due to less friction. The banana peel exactly worked as ice sheet.. At micro level there were less irregularities and due to this less interlocking.. Thank you Sir.👀🖤

[@shakiranwar8902]

Exactly you are right Rohan fell because banana's peel worked as ice sheet and because of non irregularities

[@naveeshnehra4830]

Yes are right

[@Shakirakhatoon1975]

right ✔️

[@virndrasarojsaroj8926]

Right sir

[@s-i-xgaming7108]

Uske ankh kharab thi yr 🙄

[@PANKAJKUMARSINGH-qh2sg]

15:21 - OPTION B 🗿Motion🗿 18:05 - 🗿Rough Surface🗿 35:37 - OPTION B🗿Smaller🗿 50:02 - OPTION B 🗿Decreases🗿 52:02 - 🗿Pull🗿

[@Shinchan-c3j]

1.motion 2.smaller 3.decreases........ Rohan slipped because Banana peel has a smooth surface so ,it has less irregularities on it , the force acting here is sliding friction and the opposing force acts on the opposite direction.......

[@jnvstudent2180]

Thank you sir for this amazing explanation 👍

[@Jp_gam]

[@freegyan9493]

15:05 - (B) Motion

[@ShubhamYadav-dz6cs]

Both (A) and (B) hoga bro

[@freegyan9493]

@@ShubhamYadav-dz6cs nhi bro (B) motion hoga

[@amritasculturalactivities4466]

15:47 (B) motion 35:06 (B) Smaller 49:40 (B) Decreases 51:59 -Pull

[@vgaming8277]

This vedios is post 10months agoo but I'm in 8th now so I'm watching now and i just wanna say thank you sir thank you so much i understand very well 💜

[@saikulsk6296]

Same

[@darfayazdardar3026]

Same

[@Otaku-w5q]

Same

[@gobindabiswas6646]

Same

[@lyyxiaaa]

I'm also in 8th now, but watched the videos earlier😃

[@ayushigoswami6275]

GOOD EVENING SIR ANSWER - 1 MOTION ANSWER - 2 SMALLER THANK U SO MUCH SIR TO GIVING THE OPPORTUNITY TO INVESTIGATE THIS CASE.

[@Trendingcreator169]

😊😊 good

[@madhuyadav9601]

Thinkin you bar

[@pankajchoudhary3199]

1, Motion 2,Smaller and 3, decrease Thank you soo much sir for sharing this video❄

[@lavishsainisaini158]

Hlo 34:33

[@sahim9435]

15:05 motion 😊✨♥️

[@shashikalafirozia2906]

1.motion 2. Smaller 3. Decrease Rohan fall because the banana peel makes the surface smooth, so friction between rohan feet and ground decrease.

[@Peace-cc7mq]

Mai hi kyu....????

[@imperialx8787]

1) Motion 2) Rough need more force 3) smaller 4) Decrease 5) Pull (Rolling friction) The answer of the final answer / investigation is that Rohan fall by stepping on banana because as banana's surface was smooth means having less irregularities making the friction reduce and that's why by stepping on smooth surface and surface containing less irregularities his leg slip and he fall.

[@basantkumarjha1247]

Same

[@faizanaselonmusk9204]

Goodmorning Sir Answer 1 - Motion Answer 2 - Smaller Thank you for this lecture and giving us the opportunity to investigate this case and this lecture is so amazing for me.

[@factbeast8674]

Motion

[@tanvi336]

Q1.. b option motion

[@RiteshKumar-in6oj]

Thanks sir For giving this amazing class I understand all concepts of friction

[@rajazakir2767]

Ritesh kumar tell me the full form of MBBS solve fast

[@mamonpal9754]

30:20 30:22 30:23 30:23 30:24 30:24 30:24 30:24 30:24 30:25 30:25 30:25 30:25 30:25 30:25 30:26 30:26 30:26 30:26 30:26 30:27 30:27 30:27 30:27 30:27 30:28 30:28 30:28 30:28 30:28 30:28 30:29 30:29 30:29 30:29 30:29 30:30 30:30 30:30 30:30 30:30 30:31 30:31 30:31 30:31 30:31 30:32 30:32 30:32 30:32 30:32 30:33 30:33 30:33 30:33 30:33 30:33 30:34

[@anupamsingh630]

bachelor of medicine bachelor of surgery

[@manasidwivedi8212]

Q1) b ) Motion Q2) b ) smaller Q3) b ) decreases Thank you sir for teaching us !!

[@vanshdagur2868]

18:02 rough surface will take more force

[@siyacreativity7050]

Rohan fell down because the banana peel is smooth, so it has less irregularities, as it is smooth, it decreases the friction between it and the the other surface. Due to less friction Rohan fell down

[@archanakumari-wb5xw]

Qno.1- motion Qno.2- smaller than static friction Qno.3- Decrease

[@anshikakumari3498]

Friction heat bhi generate krta h phir option c kyu nhi hoga question number one me?

[@VikramMishra95]

Answer of question 1 - Motion Answer of question of factors affecting friction - We have to apply more force to slide rough surfaces rather than smooth surfaces Answer of question 2 - Smaller Answer of question 3 - Decreasing Answer of question of wheels reduce friction - the force applied by that kid is pull to mive the trolley bag Result of our investigation - Our friend Rohan slip when he put his leg on peal of banana as banana peal is very smooth which reduces the friction plus there is juice (liquid) of banana which acts as a lubricant to reduce friction Lecture done 💯 Thanks you respected sir and a very thanks to readers. Bye.

[@ANKIT-bk6wg]

Bro konsi class main ho

[@VikramMishra95]

@@ANKIT-bk6wg 8th and you?

[@ANKIT-bk6wg]

@@VikramMishra95 Very Good English

[@VikramMishra95]

@@ANKIT-bk6wg Thanks bro but you didn't tell you class

[@ANKIT-bk6wg]

@@VikramMishra95 10th

[@gyanendrapandey3735]

In rough surface we applied more force

[@tabassumashraf7511]

Who is watching the lecture 10 days before at 2x speed

[@h12345bsr]

Rohan fell down because the surface of banana peel is smooth and on the smooth surface friction decreases. When friction decrease rohan fell down on the surface of earth. THANKS A LOT SIR FOR THE AMAZING LECTURE

[@ShreyaSingh-wc1cj]

or rohan ka luck bhi kharab tha😔

[@SahilbhaiXe_66]

Motions

[@kashiplays7028]

Watched this vid before my exam and i got 94% 😭

[@nigsolff7887]

So what is bad with 94 percentage

[@lmpckm]

Don't worry baby I got 97.9 % in my exam

[@Zareenmughal_123]

Toh l*l Es m kya hai 😂😂😂😂

[@Games_wave-official]

Usko kele ka chilka dikha nhi isiliye gir gaya 😂 - kis - kis ka same conclusion nikla hai 👇

[@shaiveethecraftlover2202]

1.Motion 2.smaller 3.decrease Rohan fell bacuase when he stepped on the peel of banana the surface became smooth.... Btw thanku sir my all doubts are clear..❤❤

[@mohammadjahangir5824]

Q1 (b) Motion Q2 (b) smaller Q3 (b) Decreases Thank you sir☺️

[@dhruvesharma8466]

15:05 - b) Motion 35:29 - c) Smaller 49:53 - b) Decreases

[@SHANU_editerz_rj05]

Motion

[@imtezshaikh3012]

Q1- motion Q2- smaller Q3- decrease Thank you sir 🙏🙏

[@S1NKI-YT]

motion (A)sir the ans of first quiz

[@sakshigusain8tharoolno.354]

1) motion 2) smaller 3) decrease This video is very helpful for me in my exam thanks sir you are the best 😊😊

[@melodymonsters]

thank you sir you're teaching in a most facinating way that I find it very interesting and understandable😀

[@ron4ie]

Repta maru ek tujhe

[@melodymonsters]

h@@ron4ie sale chaman chut chapri launda kuch parna nahi hai tuje bhenchaud

[@SanjayYadav-zj6xq]

1. motion 18:05 = rough surface 2. smaller 3. decreases Now Rohan's Case = banana peel is a very slippery thing. Rohan slipped because of crossing banana peel by his foot. reason is the less friction

[@000xyz96]

6

[@hanshachauhan7005]

3:48 Sir, rohan ek road matlab ki ek rough surface (with irregularities) me chal raha tha lekin jab achanak hi rough se smooth(with less irregularities) surface me per rkha to usne wahi force diya jo woh rough surface me de raha tha ab jab irregularities kam hogi to frictiin bhi kam hoga jab usne vo force lagaya jo vo rough surface jisme jyada friction tha usne wahi force kam friction me laga diya ab usne force jyada lagaya Or friction ke kam honi ki wajah se vo gira. CASE SOLVE!

[@vickyyadav7000]

The answer of 1st question is Motion

[@pinkydevi9858]

First stage: motion Second stage: smaller Third stage: decrease

[@i.rprateek]

THANK YOU SIR FOR GOOD EXPLANATION ANSWERS OF THE FOLLOWING QUESTIONS ARE AS FOLLOWS:- 1. (B) MOTION 2. (B) SMALLER 3. (B) DECREASES by Prateek

[@AYUSH_GAMING30]

1:20 is the way to teach ❤😊😊

[@phythongaming8590]

Ffgame

[@chhl10]

15:15=motion 35:35=smaller 50:10=decrease

[@jayshankarrai8425]

❤

[@OnlyPhonk28]

Q1. B. Motion Q2. B. Smaller Q3. B. Decreases

[@awesgamer7379]

Ans.1 motion Ans.2 smaller Ans.3 dicreases And thank you so much sir I am so happy I was really finding a good channel for class 8 th and I found this channel. i am waiting next lecture lecture

[@AnjaliKumari-ln4ov]

Q.no.1 (b) Motion Q.no.2 (b) Smaller Q.no.3 (b) Decreases Rohan fall because there was the less friction and irregularities between banana peel and Rohan' feet Thank you sir 😊

[@gamizreyaz7786]

Y

[@AnubhavSingh-rt5ke]

Hello Anjali where are you from 👋

[@manishkartikcubersking9794]

Note Kar rahe hai sir Very much good afternoon 🌞 sir Your lecture is very very nice 👍👌👍👌👍😊😊👍👍😊😊😊 sir

[@VandanaKochar]

Friction Come kaise hota hai

[@minefact01]

01:04:00 Rohan ne kele ke chhilke me ppav rakha to kele ka chhilka smooth hota hai jisse friction force kam ho gaya aur woh fisal ke gir gaya

[@AnikkrGHOSH]

😅😂 1:03:29

[@ekansh0001]

15:56 Motion 35:17 smaller 49:49 decrease

[@kumaransuman6205]

1) Friction opposes the motion between the surfaces in contact with each other. :- Rough surface 2) Sliding friction is smaller than the static force. 3)Sprinkling of powder on the carrom board decreases friction. :-Pull

[@vijaykumarsingh2941]

Ledha

[@devilgaming-pj5fx]

Motion

[@kumaransuman6205]

@@devilgaming-pj5fx 👍 I wrote it when I was in 8th

[@nitadevi9968]

Thank you sir hame irregularities samajh hi nhi aaa rha tha By the way kon kon half xearly ke last day ye dekh raha hai.....

[@mokshaasingh4637]

Q1) option b) Motion Q2) option a) Greater Q3) option b) Decreases 18:04 Rough surface requires more force

[@doilooklikeicare1567]

q2 answer is b) smaller

[@nageshwar.369]

Bro 2) ans :- smaller

[@ReemaYadav-e1i]

😢🎉🎉🎉

[@RichayadavRicha-x6e]

Thank you so much sir 🙏🏼

[@niharikajha2081]

1-(b)Motion 2-(b) smaller 3-(b) decreases Thank you so much sir for your fabulous explanation 🙏🤗

[@Emerald_rusher]

nice

[@pwianpiyush1210]

18:04 to slide an object on rough surface we have to apply more force

[@Ameliarobloxworld]

Yes so

[@pwianpiyush1210]

@@Ameliarobloxworld Sir asked the question so i commented the answer

[@ffhacker9120]

Beautiful teaching ❤

[@SanjaySingh-bu8ke]

Bahi gay hai kaya 😂

[@piyushkuchawa123]

Stage 1 ~motion Stage 2 ~sliding Stage 3 ~decreases