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Work,Energy,Work

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Teena
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PostSubject: Work,Energy,Work Fri Jan 09, 2009 9:44 pm

Plz answer these questions

1.A spring which is kept compressed is allowed to dissolve in acid.What happens to potential energy of the spring?
2.Will water at the foot of the fall be at different temperature from that at the top.Explain?
3.In a tug of war one team is slowly giving way tothe other.what work is being done and by whom?
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PostSubject: work,energy,work Sat Jan 10, 2009 6:23 pm

OK
now for the first question i don't know the answer

for the second question
it will be different if it strikes something below the foot for e.g a rock.
its potential energy (that is the potential energy of the water gets converted in to heat energy )is used to raise the temperature of the water.
BY law of conversation we get
potential energy of the water=heat energy of the water.
FORMULA m*g*h=m*c*change on temp.

for the third question
if both the teams are moving then both the teams are doing the work.the work done depends on the displacement(as u know it).work is only said to be done when some force is applied to an object and makes it to displace.


so thats done. Very Happy
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abhas
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PostSubject: Re: Work,Energy,Work Sat Jan 10, 2009 9:56 pm

1.elastic potential energy will get converted into heat energy Surprised
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