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![[Post New]](/templates/default/images/icon_minipost_new.gif) 10 Apr 2008 13:58:31 IST
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if there is a 2 particle system such that both move away frm each other one at speed v & the other at speed 2v. what is the velocity of d centre of mass??
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10 Apr 2008 14:08:46 IST
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V/2 in d direction of d body moving wid velocity 2V
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10 Apr 2008 15:14:55 IST
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if the mass of that two particles are m1 & m2 then Vcm= - m1v + 2m2v ---------------- m1+m2 if mass are same of that two particles then Vcm= v/2
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10 Apr 2008 15:17:13 IST
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rathin is rite ur problem is impossible without the masses of the two bodies
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10 Apr 2008 16:19:46 IST
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THE VELOCITY OF C.O.M. IS V/2 IN THE DIRECTION OF THE OBJECT WITH VELOCILY 2V, WHEN THE MASSES OF BOTH THE OBJECTS IS SAME
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10 Apr 2008 16:21:16 IST
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ya plzz specify mass
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11 Apr 2008 10:57:38 IST
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hmm.. both forces have defined opposite pairs in the system, so net "external" force on the system is zero. position of cm should not change..i say the answer is zero!!
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11 Apr 2008 11:18:49 IST
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Yes, Vcom = 0.
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11 Apr 2008 16:57:22 IST
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Arey how can u say that Vcm= 0 ??
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11 Apr 2008 17:54:22 IST
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bro according to you internal net force might be zero.but the c.m will move with the external force applied on it.
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11 Apr 2008 18:23:56 IST
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THE QUESTION CAN BE SOLVED ASSUMING BOTH THE MASSES TO BE SAME
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11 Apr 2008 18:37:27 IST
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Hey guys, i guess you are a bit confused between velocity and acceleration. When external force = 0, then acm = 0! which implies that vcm will remain constant
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11 Apr 2008 19:17:07 IST
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ya astatine is right
@joy & karthik
when no external force acts Acm is zero and not Vcm
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