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tryyyyyyyyyyyyyyy

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nish
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PostSubject: tryyyyyyyyyyyyyyy Fri 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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PostSubject: Re: tryyyyyyyyyyyyyyy Fri 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 Sat Jan 24, 2009 7:22 pm

thankxx Smile Smile Smile Smile Smile

Last edited by nish on Mon Feb 16, 2009 12:20 pm; edited 1 time in total
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PostSubject: Re: tryyyyyyyyyyyyyyy Tue Feb 03, 2009 4:52 pm

that's gr8!!!!!!! cheers
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Complete IIT AIEEE ICSE ISC PMT help forum :: Physics :: Physics Question answer-