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![[Post New]](/templates/default/images/icon_minipost_new.gif) 10 Mar 2008 16:44:25 IST
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(a)both assertion and reason are true and reason is the correct explanation of assertion
(b)both assertion and reason are true and reason is not the correct explanation of assertion
(c)assertion is true but reason is false
(d)both asertion and reason are false
(e)assertion is false but reason is true
assertion: a race car traveling around a circular track has a non-zero impulse
reason: the impulse is only zero only when there is n net change in momentum
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10 Mar 2008 16:52:34 IST
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answer it
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10 Mar 2008 16:54:45 IST
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According to me "a",is the right answer. Plz rate,if right.
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10 Mar 2008 16:57:18 IST
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i think u are right but i i had posted it because i was not sure
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10 Mar 2008 17:04:48 IST
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the answer is 'e'...bcoz momentum is a vector quantity.....while going round the circle the velocity changes at every instant bt not speed[in uniform] ..hence there is change in momentum
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10 Mar 2008 19:45:44 IST
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c)
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Will nip in at times to solve problems :)
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10 Mar 2008 19:46:30 IST
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how it is C karthik i think it is a
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10 Mar 2008 20:01:35 IST
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Sorry... didn't see the "n for no" in the reason. Yeah its a)
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Will nip in at times to solve problems :)
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10 Mar 2008 20:02:12 IST
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thanx karthik rated u
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10 Mar 2008 20:03:21 IST
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Explanation : in circular motion, the velocity vector keeps changing its direction, hence it keeps changing. If its non uniform circular motion, then v changes both in magnitude and direction. Hence, the result
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Will nip in at times to solve problems :)
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11 Mar 2008 17:15:24 IST
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hey karthik....this was nt expected at least frm u....even in uniform circular motion the momentum changes because the velocity vector changes.....!!!
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11 Mar 2008 20:07:16 IST
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@mohit - do you see anything wrong in that? If so, please do correct me
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11 Mar 2008 20:22:42 IST
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" impulse " of what on what?
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My name is Arnav.
Hoping we'll meet in IIT next year ! |
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