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High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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4 years ago by srinivasulu T

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sir if a block is moving with some velocity let us assume it as "U" on a smooth horizontal table and it is having friction on its top but not at the bottom which is in contact with the floor.Now suppose another block of mass "M" is drooped on to it while it is in motion now my doubt is will the bock slow down its initial speed "U"....i.e.,U initial will be greater than U final or not..Hope you understand my doubt..

7 years ago by Neelesh

Ans 1 ->

obviously, due to addition of mass the velocity will decrease.i think ur doubt is about the friction in the surface.if that is the doubt then the exp goes like this, the block which u r keeping is staying on the second block only because of friction...(in the molecular level due to the friction present they are interlocked)

6 years ago by latanandb1

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Thank you so much sir

7 years ago by Shree Kant Sharma

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sir there are some concepts like reduced mass and centre of mass frame of reference which are not in the lectures and I c many question in test series which I often fail to cract it.. can u please upload those oncepts sir

8 years ago by BHARADWAJ SUBRAMANIAM

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hi sir how we can analyse the formulae and features of such rotating bodies

8 years ago by hemanthsai

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SIR IN SOME RARE CASES CAN THE CENTRE OF MASS BE OUTSIDE THE BODY BY ANY CHANCE

9 years ago by SAI SMARAN S B

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YES Eg in ring and many other objecs

9 years ago by Vishal Ray

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sir in example 4 how can u say that the second fragment will definitely go in the horizontal direction only.... according to me if we equate the momentum of the particle at the projected point and the explosion point we will definitely get a component of velocity of second particle in y direction..i think the answer solved here is incomplete ... isn't it? plz reply as soon as possible

9 years ago by Khushboo Jain

Ans 1 ->

sir calculated momentum at highest point where y component vanishes

7 years ago by VARUN a

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Video Lectures

High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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