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![[Post New]](/templates/default/images/icon_minipost_new.gif) 7 Nov 2007 20:43:43 IST
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A block of ice is kept on a large tray and the system is kept in gravity free zone . If the ice melts , find the shift in the position of centre of mass of the system .
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Umang |
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7 Nov 2007 20:46:33 IST
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com doesnt change its position bcoz no net external force is acting here. so the block of ice melts into water of shape of a sphere whithout change in com i guess.
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They say ITZ NOT THE APTITUDE BUT THE ATTITUDE WHICH DECIDES U R ALTITUDE . THEN WHY M I NOT AT THE TOP IN THIS SITE? LIFE IS JUST NOT FAIR. |
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7 Nov 2007 20:49:50 IST
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the forces causing the change in state are internal
since only an external force causes a change in the position of centre of mass the centre of mass retains its previous position
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science-
the most fundamental
the most eternal
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7 Nov 2007 20:54:54 IST
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So u mean to say that even after melting , the block remains cubical ????
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Umang |
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7 Nov 2007 21:03:16 IST
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is the ans mL / 2 ( m + M )
where m is the mass of ice and M is that of tray ?
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it is not important where u stand, but in which direction u are moving |
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7 Nov 2007 21:05:47 IST
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i think it does since there is no gravity
so though the state changes there is nothing that can change its shape
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science-
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the most eternal
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7 Nov 2007 21:07:09 IST
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Hey ramyani !
This is the answer when gravity is present . This question's answer is zero .
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Umang |
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7 Nov 2007 21:09:13 IST
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I think u r right madman !
Thanks !!
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Umang |
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7 Nov 2007 21:09:50 IST
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yes. indeed.
I was wrong.
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it is not important where u stand, but in which direction u are moving |
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7 Nov 2007 21:10:32 IST
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owaaaa.
come on tell me the correct answer.
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it is not important where u stand, but in which direction u are moving |
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7 Nov 2007 21:13:03 IST
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no probs
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science-
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the most eternal
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