Discussion of Block over Block Friction Quiz for JEE & NEET |

In JEE & NEET, both exams the topic of friction between block over block problems is very important and it forms the basic understanding of cases of friction in mechanics. In PIM video Ashish Arora sir has explained all the concepts for cases of a block over another block is placed and one of the block is pulled by an external force.
In this video Ashish Sir has analyzed all the quiz discussion questions given for students (listed below) and explained in detail about how to approach solutions to such questions. Basic theory with illustration is explained in the PIM video of block over block friction cases which can be accessed through the link - • Block over Block Frict...
For quick revision of friction for JEE & NEET, students can watch Physics Galaxy revision checklist video available at link - • Friction | Revision Ch...
Detailed understanding of the concept can be covered through the Physics Galaxy Concept videos available through our channel playlist or our website.
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To understand all the applications of friction and dynamics, students can refer our Physics Galaxy series of books. These books are available for purchase at below link -
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Practice Quiz Questions solved and analyzed in this video -
Q1. A 4kg block is placed over 5kg block on a smooth ground. Friction coefficient between 5kg and 4kg is 0.5. A force F is applied horizontallay on 5kg block. Find at what value of F sliding will start between the two blocks ?
Ans [45N]
Q2. A 4kg block is placed over 5kg block on a smooth ground. Friction coefficient between 5kg and 4kg is 0.5. A force F is applied horizontallay on 4kg block. Find at what value of F sliding will start between the two blocks ?
Ans [36N]
Q3. A 5kg block is placed over 10kg block on a smooth ground. Friction coefficient between 5kg and 10kg blocks is 0.2. A force F is applied horizontallay on 5kg block. Find at what value of F sliding will start between the two blocks ?
Ans [15N]
Q4. A 10kg block is placed over 20kg block on a rough ground. Friction coefficient between 20kg and ground is 0.2 and that between the two blocks is 0.1. A force F is applied horizontalay on 10kg 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 [On ground never start, between the blocks at 10N]
Q5. A 20kg block is placed over 20kg block on a rough ground. Friction coefficient between lower 20kg and ground is 0.1 and that between the two blocks is 0.6. A force F is applied horizontallay on upper 20kg block. Find at what value of F sliding will start between lower block and ground then at which value sliding will start between the two blocks ?
Ans [40N, 280N]
#physicsinminutes #physicsgalaxy #jeeadvanced

[@physicsgalaxyworld]

Basic theory with illustration for block over block friction cases is explained in PIM video Mechanics #3 & #4, which can be accessed through the link -

[@AMAR-pc6ht]

👑⛑👒🎩Hats off to ur dedication sir!!! 🙏🙏🙏🤜

[@anmoltripathiiitkgp7019]

Very very happy diwali to PG and team !...

[@lifelines9547]

Sir happy diwali and I feel very happy as I learned my physics from you and your colleague as my physics teacher also follows you .you are very good mentor sir .

[@tusharkumar6191]

Thank you ashish sir and the whole PG team for doing this fabulous work even on the day of holiday....Happy Diwali Sir and the whole PG team..🙏

[@foodieskitchen8472]

Sir thank you so much,my all doubts are cleared in this video.

[@prachimunshi7766]

Thanks for the video and happy diwali to you ❤️

[@bullymaguire827]

Happy Diwali Sir to you Poggie and entire PG team.

[@chiragbirla5606]

Very happy diwali to sir to you and whole PG team

[@arpitshukla3127]

I've never seen such type of explanation..... Wordless

[@SamudraFlavorsYT]

sir, you are doing gods work

[@raidsami5806]

Keep Going Sir

[@pratyush7316]

Best teacher ❤️😍😍😍😍❤️

[@vinodshuklaMSc]

Best video of 2 blocks friction on RUclips in 10 minutes 🙏

[@bhuvansavant4832]

Thank you sir very much . Btw wishing you and PG team happy diwali

[@m.srivani424]

Sir pls say how you got this much knowledge..

[@karanrajsinha8081]

thankyou sir for always support and make us always motivate thankyou for efforts wish you a very very

[@prabirkumartiwary2257]

I always wait from

[@Rohan-nl5eo]

Happy Diwali Sir and PG team ❤❤

[@sugaster4486]

thank you sir for hard work....wish you and your team a very happy Diwali