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nish
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nish


tryyyyyyyyyyyyyyy Vide
PostSubject: tryyyyyyyyyyyyyyy tryyyyyyyyyyyyyyy EmptyFri Jan 23, 2009 5:08 pm

Very Happy as a ballon rises up its KE and PE both increase does this violate the law of conservation of energy Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation
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abhas
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PostSubject: Re: tryyyyyyyyyyyyyyy tryyyyyyyyyyyyyyy EmptyFri Jan 23, 2009 7:57 pm

actually its gravitational potential energy is decreased ON RISING UP

gravitational potential energy = -GmM/R

m is its mass
M is earth's mass here and R is distance from earth's centre.
G is universal gravitation constant.

this gravitational potential energy gets converted into kinetic energy
gravitational constant = 6.67300 × 10-11 m3 kg-1 s-2
it may sound strange to you now but it will become more clear in 11th

negative potential energy indicate bound stage if u give this much energy to body then it will go to infinity(out of earth's grav. field/will leave earth).Such min velocity given to body is escape velpcity.




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PostSubject: Re: tryyyyyyyyyyyyyyy tryyyyyyyyyyyyyyy EmptySat Jan 24, 2009 7:22 pm

thankxx Smile Smile Smile Smile Smile

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PostSubject: Re: tryyyyyyyyyyyyyyy tryyyyyyyyyyyyyyy EmptyTue Feb 03, 2009 4:52 pm

that's gr8!!!!!!! cheers
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