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27 Oct 2009 20:44:43 IST

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MECHANICS DOUBT

Physics , Mechanics , Kinematics , NewtonsLawsCirMotion , Work Power Energy collisions , Rotation , Gravitation , Simple Harmonic Motion , Fluid Mechanics , Materials Wave Sound , Super Position , units dimensions , com momentum , shm , wave sound

PLZ. SOLVE RATES ASSURED::::::

WHAT WILL BE THE SPEED WITH WHICH MASS M WILL HIT THE BLOCK WHEN THE MASS m IS RELEASED..

STRING IS LIGHT. PULLEY IS FIXED.

do post your attempts as i only have the answer

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Comments (15)

Karthik Ramaswamy

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27 Oct 2009 20:55:47 IST

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question seems absurd.. the rope and the pulley both are fixd?

vijay kharya

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27 Oct 2009 20:58:31 IST

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NO THE ROPE IS NOT AT ALL FIXED. THE PULLEY IS FIXED

jee-do or die

Blazing goIITian

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27 Oct 2009 21:37:43 IST

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WHAT IS ANSWER

vijay kharya

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27 Oct 2009 21:40:00 IST

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yaar ans ke bina kar

attempt kar main fir batadunga

jee-do or die

Blazing goIITian

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27 Oct 2009 21:43:17 IST

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YAAR BLOCK KAUNSA HAI

Abhinav Jain

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27 Oct 2009 21:47:01 IST

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seeif this helps and do rate me!

M. Fuaad Khan

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27 Oct 2009 21:51:58 IST

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YAAR AAP KAH RAHE HO TO ATTEMPT KIYA HAI MAGAR ANS GALAT HUA TO GHUSSANA NAHIN

a = (1/2g)/ (5/2) = g/5

Now v² = 2gs

v² = (2 x 9.8 x1) / 5

=> v = 2m/s (approx)

Akshay

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27 Oct 2009 21:55:47 IST

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ans is 6.6/(5)^1/2rate me if my ans is correctdo ask if u need exp. it it just conservation of energies

vijay kharya

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27 Oct 2009 22:20:11 IST

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@ABHINAV JAIN

YOUR ANSWER IS ABSOLUTELY CORRECT TO SECOND PLACE OF DECIMAL.

BUT PLEASE TELL WHY ARE YOU SUBTRACTING 2 FROM (SQRT(5)-1)

THNX

Priyak Dey

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28 Oct 2009 14:52:52 IST

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ITS A NIC QUES>.............I WILL POST THE SOLN AFTER COMING FROM TUTION......TK CR...........

Abhinav Jain

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28 Oct 2009 15:43:43 IST

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@vijay i cant understand what u r trying to say in which step are u asking.(NOTE:- for your doubt you can download my soln picture and circle ur doubt by editing it in paint and then uploading it,also do nudge me!)

vijay kharya

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28 Oct 2009 22:00:53 IST

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I JUST WANT TO CLARIFY THAT WHY ARE YOU SUBTRACTING 2 FROM (SQRT(5)-1)

vijay kharya

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28 Oct 2009 22:04:24 IST

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SORRY I MADE A MISTAKE IN WRITING THE QUESTION

WHAT WILL BE THE SPEED WITH WHICH MASS M WILL HIT THE BLOCK WHEN THE MASS m IS RELEASED..

SHOULD BE CORRECTED TO

WHAT WILL BE THE SPEED WITH WHICH MASS M WILL HIT THE WALLWHEN THE MASS m IS RELEASED..

but most probably i think that the approach was followed for the corrected one.

Yagyadutt Mishra

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Joined: 19 Feb 2009

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28 Oct 2009 22:22:24 IST

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Why all student are taking the distance as 2 m...as only one meter length wire is connected between M and wall..

So M will fall only 1 m down..

And if this is the question..then it is the general question man..

At height 1m M has potential energy Mgh = 2*9.8*1 = 19.6

and then it is converted into kinetic energy 1/2 * M * v^2 = v^2

and equate v = root(19.6)

i don't know what all are doing in this,.......Just one thing is new ...when m is relesed...nothing matter..it is realesed from rest..so M will also realesed from rest..

harsh

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29 Oct 2009 07:38:34 IST

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