Advance Illustrations – Sliding on a Surface Having Varying Friction | NLM #20 for JEE Advanced

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 Sliding on a Surface Having Varying Friction which is important for select in IIT.

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[shinchannohara]

Can we not do it by conservation of energy. When i did so i am getting the answer for maximum distance to be halved. Please someone guide

[mohitr]

Why acceleration is 0 for Max velocity? Is it true for all cases? I am confused.. Please help me sir...

[pawsandclawsuniverse]

Why acceleration=0 for maximum velocity

[anmolempire]

Those who don't understanding why at a=0 Vmax:

1) simply do dv/dx=0 you will get maximum value of X at which v is max, (as d^²v/dx^²<0

2) conceptually relate it with SHM, at mean position V is max but acceleration is zero..

[ritapattnaik]

wont the block slide again after coming to rest..because once at rest it is the same situation as before

[freethinker]

Sir shouldn't normal force increase