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Discussion Response Post to: gravitation

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16 Mar 2007 16:56:07 IST

Subject: Re:gravitation

DON007 (1463)

Blazing goIITian

265 [334 rates]

total posts: 602
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hey look..........

learn.........

V = -gGM/ (^{[ 2]}

(x² + R²))

WHERE X---- distance from ring.........

now..........use conservation of energy

U(initial)=U(final)+ 1/2mv²

-GMm / ( ^{[2 ]}

(R²+R²) = - G M m / R + 1/2 m v²

cancelling m............

and simplifying ..........we get...........

GM/R - GM/^{[ 2]}

2R = 1/2 v²

^{simplifying it we get.............}

v= sqrt[ {2-sqrt(2)} * GM/R]

hence option d is correct..............

hope u unferstands.

thanku

BELIEVE IN URSELF.....BECAUSE I BELIEVE IN U..............

this reply: 10 points (with 2 Olaaa!! Perrrfect answer.

in 2 votes ) [?]

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