Adv Illustrations – Force Required to Slide a Block | Newton's Laws of Motion #52 for JEE Adv

Questions asked in JEE Advanced are based on critical thought processes rather than direct application of concepts. For preparation of JEE Advanced, students have to focus on problems based on multi concept applications.

Ashish Arora Sir has taken up a case of Force Required to Slide a Block which is important for select in IIT.

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[bimleshkumar]

Sir there is mistake in finding the limiting friction of block u have taken the value of normal as N2 but that is not total normal force acting on B is why limiting friction is incorrect here and it's actual value is u(N2+T/√2) = 25 N

[sonamkaurkhurana]

sir if there would have been no friction bt the blocks, block B would fall down??

[kumaranshul]

Sir what happen with the vertical components of friction

[akashsinghchauhan]

Respected sir, at 1:45 a force N2 should also be there parallel to 20g which is exerted by block B on A.
is it or not ?

[satyenjha]

sir why would block A move first rather than block B?