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![[Post New]](/templates/default/images/icon_minipost_new.gif) 2 Sep 2008 20:35:14 IST
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Q) Work done by the conservative forces on the system is equal to---
1) Change in Kinetic Energy of the system
2) Change in potential energy of the system
3) Change in total mechanical energy of the system
4) None of the above
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@seth |
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2 Sep 2008 22:02:38 IST
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ANSWER
2
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2 Sep 2008 22:12:06 IST
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well its actually the negative of change in potential energy
but here it seems they are asking the magnitude so answer is 2
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Time is money, Money is the root of all evil, and knowledge is power. Therefore, Procrastination is the key to world peace. |
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2 Sep 2008 23:35:21 IST
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i feel it is (1) because work done by conservative forces =change in K.E.= -(change in PE)
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2 Sep 2008 23:38:27 IST
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nopes because some external forces and non - conservative forces may also be acting on the system so change in K.E may not be equal to -{Change in potential energy}
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Time is money, Money is the root of all evil, and knowledge is power. Therefore, Procrastination is the key to world peace. |
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3 Sep 2008 00:00:36 IST
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Re:Work done in conservative force is zero. Hence ans- (4)
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Gabbr has said "Jo Dar.... Gaya So Mar.... Gaya"
If we fear of mathmatics then we are mortal. |
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3 Sep 2008 00:20:11 IST
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it is not important where u stand, but in which direction u are moving |
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3 Sep 2008 03:02:25 IST
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yes answer is zero
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3 Sep 2008 17:29:51 IST
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what !!!!!!!!! people have you gone mad ....
who said that work done by conservative forces is zero
its zero only when the system returns to its original configuration ....
It seriously hurts when people get rated for their wrong answers
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Time is money, Money is the root of all evil, and knowledge is power. Therefore, Procrastination is the key to world peace. |
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3 Sep 2008 17:57:12 IST
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the work done by conservative forces maynot be equal to zero.
It changes d potential energy, independent of the path taken
Hence the ans. is -2
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