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anonymous
 one year ago
INTEGRATION
The inner and outer radii of a half hollow sphere are a and b.Find the center of gravity.Please help
anonymous
 one year ago
INTEGRATION The inner and outer radii of a half hollow sphere are a and b.Find the center of gravity.Please help

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Through intergration

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You have to consider this as a solid sphere and then integrate from a to b right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You have to consider this as a solid sphere and then integrate from a to b right?

geerky42
 one year ago
Best ResponseYou've already chosen the best response.1Can you help? @ganeshie8 @zepdrix

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I know the answer but don't know how to prove

Elsa213
 one year ago
Best ResponseYou've already chosen the best response.0This might help, Zupari. c: http://physics.stackexchange.com/questions/100444/whyisthemomentofinertiaforahollowspherehigherthanauniformsphere

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.0center of gravity? .... wh... ut? 0_o

geerky42
 one year ago
Best ResponseYou've already chosen the best response.1Nothing to do with moment of inertia lol

geerky42
 one year ago
Best ResponseYou've already chosen the best response.1I think it's best that you define for us exactly what "center of gravity" is. @Zupari

geerky42
 one year ago
Best ResponseYou've already chosen the best response.1Looks more like question for physicist, not mathematician lol.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sorry i don't know the exact english word but i think thats the word

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Centre of gravity of a hollow sphere is a/2 likewise you have to integrate and find the point of this object

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.0the translation is fine :) im just not familiar with the concept. hmm

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.0is it a complete sphere or an hemisphere ?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.0because if it were a complete sphere, dont u think the center of gravity just lies at the center

geerky42
 one year ago
Best ResponseYou've already chosen the best response.1Complete sphere would be more trivial, but he still have to prove it either way.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0answer is 3{(a+b)(a^2 + b^2)}/8( a^2 + ab + b^2)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.0do you mean (0, 0, 3{(a+b)(a^2 + b^2)}/8( a^2 + ab + b^2))

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0https://www.youtube.com/watch?v=UiAHEv6PRA watch this if u don't know the concept.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0likewise you have to apply that to this boy.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1436562465745:dw

dan815
 one year ago
Best ResponseYou've already chosen the best response.2i like this simplification, just find it for 2 circles

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i cant get the given answer

dan815
 one year ago
Best ResponseYou've already chosen the best response.2by symmetry the center x is the origin now just determine y center

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0its not that simple you have to integrate

dan815
 one year ago
Best ResponseYou've already chosen the best response.2can you think of how to write that with integration

dan815
 one year ago
Best ResponseYou've already chosen the best response.2or u can try to find the mean radius too that is fine

dan815
 one year ago
Best ResponseYou've already chosen the best response.2i am thinking of this one geometrical way, maybe it works maybe it doesnt take al ook at it

dan815
 one year ago
Best ResponseYou've already chosen the best response.2how about finding a point such that the sum of all the vectors from the edge will equal 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\int\limits_{a}^bb ^{2}x  x ^{3}/\int\limits_{a}^b a ^{2}  x ^{2}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0by solving this i dont get the given answer

dan815
 one year ago
Best ResponseYou've already chosen the best response.2find this out though because there might be a really nice way if u get this

dan815
 one year ago
Best ResponseYou've already chosen the best response.2cause then you can take the mean of the 2 given radii (a+b)/2 and see what the point on that circle radius would be such that all the sum of the vectors = 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0honestly i don't know what u just said maybe its because we are 100s of miles away and our education system is different

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im in sri lanka if u've heard

dan815
 one year ago
Best ResponseYou've already chosen the best response.2okay wait, so how did u get those 2 integrals

dan815
 one year ago
Best ResponseYou've already chosen the best response.2\[ \int\limits_{a}^bb ^{2}x  x ^{3}/\int\limits_{a}^b a ^{2}  x ^{2} \]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1436563494387:dw

dan815
 one year ago
Best ResponseYou've already chosen the best response.2well we can ignore that since we are assume its homogenous, we are finding center of volume, but continue

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1436563681149:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0since the solid part is from a to b integral is from a to b BUT I CANT GET THE ANSWER

dan815
 one year ago
Best ResponseYou've already chosen the best response.2does this make sense? we are finding the mean height

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0uhhh...i dont know how to solve that square root inside integral our syllabus doesn;t include that part

dan815
 one year ago
Best ResponseYou've already chosen the best response.2ya u have to convert to polar coord

dan815
 one year ago
Best ResponseYou've already chosen the best response.2here is a better way from polar
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