Block over Block Friction Cases for JEE(Adv) | Class 11 Physics in Minutes |

[@physicsgalaxyworld]

Practice Questions for students on concept of above video. Students are required to solve these questions and verify the answers given and for Q3. Solve the question and post your answer in comment section for discussion and verifying your answers. In all below questions take g = 10m/s². Q1. A 4kg block is placed over 8kg block on a rough ground. Friction coefficient between 8kg and ground is 0.5 and that between the two blocks is 0.2. A force F is applied horizontallay on 8kg block. Find at what value of F sliding will start between 8kg and ground then at which value sliding will start between the two blocks ? Ans [60N, 84N] Q2. A 7kg block is placed over 5kg block on a rough ground. Friction coefficient between 5kg and ground is 0.3 and that between the two blocks is 0.5. A force F is applied horizontallay on 5kg block. Find at what value of F sliding will start between 5kg and ground then at which value sliding will start between the two blocks ? Ans [36N, 96N] Q3. A 10kg block is placed over 20kg block on a rough ground. Friction coefficient between 20kg and ground is 0.1 and that between the two blocks is 0.2. A force F is applied horizontallay on 20kg block. Find at what value of F sliding will start between 20kg and ground then at which value sliding will start between the two blocks ? Ans [Post Your Answer of Q3 in comment section to verify]

[@ShivamKumar-xd7ln]

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[@arijitkumardas2613]

Sir, plz post such questions after every video based on the content of the video

[@dkbhakar1319]

30N and 60N

[@samarthpatil3864]

30 and 90 N

[@prabalsonakiya3823]

30N and 90 N respectively

[@scichotics6351]

Sir you are literally the best teacher who makes concepts too easy to understand. You make all of us love Physics. Sir please start something live for class 11 JEE also if possible !!!

[@santhoshikumari577]

Yes sir please try to do that

[@Pal_yt]

Thanks sir, friction is clear now.

[@dhairyamehra9211]

Answers of Question-3 is (a) 30 N and (b) 90 N respectively

[@INSPIRING_ROHIT]

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Why

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[@ankushraj2714]

30 N and 90 N. thank you soooooo much sir for these valuable videos. these are very very helpful for all of us.

[@physicsgalaxyworld]

Great, You got it right Ankush!

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[@sumitdebnath4311]

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[@showshotta2182]

30N & 90N

[@shubhverma4932]

thank you sir you are the best physics teacher i have ever seen most hardworking person with no glimpse of the slightest arrogance 🙏🙏🙏🙏

[@physicsgalaxyworld]

thanks a lot and all the best

[@shahajimadale3262]

thank u sir , I have massive doubts in this beat, but all is crystal clear now

[@sejalsangole2527]

Answer for the 3rd question is 30N and 90N...am I correct? Thank you so much Sir..for these amazing sessions..🙏🏼

[@tusharmehta2511]

Sejal Sangole yes 30 N and 90 N

[@physicsgalaxyworld]

You got it right Sejal!

[@cosmolearner5562]

Yes

[@cosmolearner5562]

@@AbhinavSingh-qk4so sir had pinned the comment of Q, see it

[@dhirajbora4325]

Yes

[@thechrist1399]

3:40 is it not possible that M2 slides over M1 before they move together with a common acceleration. Suppose if value of limiting friction for M2 is less than value of limiting friction for M1 , in that case is it not possible that M2 slides over M1 before they both(M1 and M2) start moving together?

[@prathamjain9185]

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[@shubhammahajan3745]

I am not getting when the two blocks will have common acceleration and when would they have different accelerations....can someone plzzz help🙏

[@creativeminds5168]

2:23 🌟🌟

[@prabirkumartiwary2257]

My concept is crystal clear now.THANK YOU SIR.😊

[@luckylokeshrock]

Seedhi baat no bakwas....hats off sir...cause you didnt tell lot of stories in between and wasting time of students.....true content...

[@Hello-nd9yj]

Q3....30 N and 90 N respectively

[@physicsgalaxyworld]

Thats right ! Good going !

[@megak0932]

answer is 30N to start the sliding between the block and ground, and 90N for sliding between blocks, as 60 will be required for upper block to slide and 30 for the lower and ground = 90N.

[@universalmultistellar6266]

30N ,90N is the answer. Very easy question, I m thinking. But reality is that Ashish sir has made us so prone to solve this types of problems. Thankyou Sir

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i thjink sir is GOD.............he knows what i want i was struggling with this type of ques and he uploaded just what i wanted

[@anshul4398]

best teacher 🙇🙇‍♂️ thanks sir

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Thank you for this video sir🙏🙏🙏🙏🙏

[@abhalabhavi3037]

The only satisfactory Physics teacher in internet is "Physics Galaxy "... 👏👏

[@akshatv3539]

1) limiting friction of ground touching block is 30 N 2) the maximum force by which both boxes can move, while staying at rest with respect to each other (F max) is 90 N. Thank you sir. Hindi videos are very helpful sir. I am following your guidance for my Medical entrance this year.

[@aditya_saha]

if F is less than the combined combined friction, then according to fbd, m2 moves while m1 is static? how is this possible

[@anujtiwari8487]

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[@nit-patna]

Above or equal to 90 N requied for sliding between two blocks and min force requied to move is 30 N

[@Seya02]

Q. 3 F at which sliding begins between ground and blocks= 30N. F at which sliding begins between blocks = 90N.

[@amarnathboro1634]

i)30N, ii) 90N

[@cs_010_adityaverma2]

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[@aakanksha2851]

Ans.3 90N,30N sir acc. to previous questions I understood that 90 will be 1st ans.and 30 will be second ans.?

[@dkbhakar1319]

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[@mayankkumar-jy4yg]

Thank u sir,it was extremely needed

[@kushagrasingh467]

3) 30N and 90N

[@shalinipriya5299]

Q3. Ans=30N & 90N

[@physicsgalaxyworld]

Thats right ! Good going !

[@anshulchaturvedi7045]

[ 30N,90N ]

[@anotheridiotd7703]

can't thank you enough sir :)))

[@anordinaryguy207]

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[@11sfhunter47]

Q1. A 4kg block is placed over 8kg block on a rough ground. Friction coefficient between 8kg and ground is 0.5 and that between the two blocks is 0.2. A force F is applied horizontally on 8kg block. Find at what value of F sliding will start between 8kg and ground then at which value sliding will start between the two blocks ? Ans [58.8N , 82.32N] Q2. A 7kg block is placed over 5kg block on a rough ground. Friction coefficient between 5kg and ground is 0.3 and that between the two blocks is 0.5. A force F is applied horizontally on 5kg block. Find at what value of F sliding will start between 5kg and ground then at which value sliding will start between the two blocks ? Ans [35.28N , 94.08N] Q3. A 10kg block is placed over 20kg block on a rough ground. Friction coefficient between 20kg and ground is 0.1 and that between the two blocks is 0.2. A force F is applied horizontally on 20kg block. Find at what value of F sliding will start between 20kg and ground then at which value sliding will start between the two blocks ? Ans [29.4N , 88.2N]

[@devilsingh1239]

Answer is 30 and 90 respectively

[@apilchaudhary3094]

Sir, after limiting friction on upper block is achieved will a) acceleration of upper block = acceleration of lower block b) acceleration of both blocks are different c) whats the direction of acceleration of upper block

[@L-u-f-f-y6082]

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[@srinivasrao9117]

Very easy shortcut nice.

[@omsinghvashishtha6398]

Ans for the 3rd Ques is [30 N ; 90 N ] . Also,waiting for also your incoming videos .

[@bhanuchoudhary8796]

Thanks for your class 😊

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[@ShivamKumar-xd7ln]

Thanks sir for your all effort your revision checlist videos really boost my prepration to next level

[@manishagupta7373]

sir 30 and 90 thank you for your extraordinary support

[@deekshatayade307]

Answer is 30N and 90N.

[@physicsgalaxyworld]

Thats right ! Good going !

[@abinasojha264]

Answer for question number 3. 30N and 90N.

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Do optics, resistance circuits and modern physics as it is same as atomic structure of 11th chemistry

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I myself cleared stage 1 last year

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Thank sir

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Ese videos dete rahiyega sir much much support and respect from a 11 th grader 😊😊

[@mayurimahajan3288]

Can't thank you enough sir !

[@AmanSingh-dk4eg]

Ans. 3rd ka 30N and 90N

[@physicsgalaxyworld]

Correct Aman

[@UMESwapnadipDas]

Q.3 Ans:[30N,90N]

[@physicsgalaxyworld]

Thats right ! Good going !

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sir how to solve for 3 block ? please make a video on that. i am unable to solve such problem of hc verma

[@saurabhvishwakarma3541]

Sir please make video on rotation of rod and it's analysis

[@physicsgalaxyworld]

keep watching, coming soon

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Sir how to prepare for advanced And Ans is 30 and 90 N

[@physicsgalaxyworld]

correct Rahul!

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See CAPS and Orientations of PG

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Your all videos are very beneficial

[@sonuyadav-fq9te]

Block over block wale numericals me dono block agar different acceleration se chal rhe h to F. B. D. banate time pseudo force kyu nhi consider krte

[@abhinavpandey7265]

Ans 3 . Part 1-30N Part 2-90N

[@dkbhakar1319]

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[@physicsgalaxyworld]

It will be announced soon.

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Plz sir make a vedio for jee advanced 2020 as well .plz

[@physicsgalaxyworld]

For JEE Advanced 2020, live review classes of sir are coming up soon

[@subrapradipdas9109]

30N ;90N

[@physicsgalaxyworld]

Correct Pradeep!

[@arnavahuja2282]

Thx sir for clearing my doubt 😀😍

[@pankajshukla8965]

Q.3 ans 30N and 90N

[@Pranjal_Mayank]

Please make a video regarding important topics for jee advanced chapter wise.

[@physicsgalaxyworld]

Coming up soon.

[@sarika7069]

30 N and 90 N respectively

[@Dileswar_Padhan]

For homework Q - [30N, 90N] Thanks for the video and quiz 🙏🏻

[@vinodbro27]

Sir ek doubt hai? Ye PAUG kon hai??? Sir please urgent hai

[@AnkitKumar-xl7jf]

thank you s😀😀😀😀 for this awesome session

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Sir plzz do analysis for jee advanced physics.

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[@aftabalam3230]

Sir kindly solve few questions on block over block in which force is applied to each block .

[@varun_ydv07]

For A F>30N and for B F=90N

[@shubhanshyadav3983]

Will you post the video for electrostats and magnetic?

[@gouravdutta9464]

Thank you sir:)

[@intellectance9893]

Q3) F=30N

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[@physicsgalaxyworld]

this is

[@pushkalvashishtha4271]

@@physicsgalaxyworld thank you sir 🙏

[@yashagrawal1256]

sir jee advanced me lens eqn aur ,modern physics ke kch topic s regularly puche ja rhe hai unke concepts pe differential eqn ke form me solve kane me prblm ho rha hai

[@makurluv]

Sir and is 30N and 90 N.........sir plzz if possible make a video for microscope and telescope......🙏🙏🙏🙏

[@physicsgalaxyworld]

Thats right ! Good going !

[@deeptangshupaul1513]

Answer for the first part is 30 N and for the second part is 90 N

[@urmilasharma6960]

Thank you sir🎉

[@atulraj538]

U r Just osm sir......

[@spsi2217]

I don't get it, so what is the equation for F? You left it blank

[@uttam2274]

Required answer :- 30N, 60N

[@chaithanyashetty289]

sir answer for 3 rd question is 30N and 90N

[@karteekbhalerao1512]

Sir I salute you...💕 And also request you to please make more videos on such important concepts ..which help us🤘

[@AB-do5tt]

Ans - 30N 90N

[@paritkansal7009]

Sir please also include 3 block problem .

[@physicsgalaxyworld]

coming up soon... subscribe our channel to keep updated on our videos !

[@kartikrathore3025]

Q.3 Ans[30N,90N]

[@AbhishekSingh-wm9bs]

Sir please advance illustration hindi mien bhi bna dijiye sir please

[@vanshikhasingh699]

Sir ...when will booster series for advanced be started???