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![[Post New]](/templates/default/images/icon_minipost_new.gif) 15 Jul 2007 08:35:25 IST
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When we push a wall for a long time no work is done but we lose energy .why?????????
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15 Jul 2007 08:46:54 IST
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when we push a wall we apply a force to the wall normal to the wall's surface,
but the displacement is zero
and thus work done is zero
but the energy is spent to apply the force,
and this force is not large enough to move a wall and thus work done is zero
and energy is spent in vain
rate me if i am correct
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
       
<DIV ALIGN="right">Animated Letters</DIV></TD></TR></TABLE>
BURNIN FRM WITHIN
Impossible is Nothing
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15 Jul 2007 09:00:08 IST
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but suppose im pushing it from morning 2 evening spening thosands of calories
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15 Jul 2007 09:09:29 IST
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the time is no factor here
as you know work = force x displacement,it matters only on the force applied and the displacement observed
and not on the amount of calories burnt or on the time utilized
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
<DIV ALIGN="right">Animated Letters</DIV></TD></TR></TABLE>
BURNIN FRM WITHIN
Impossible is Nothing
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15 Jul 2007 09:59:32 IST
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in this case no work is done in the physics domain
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you are in the competition to beat the competition
you work hard for a desired result |
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