Question

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

Answer 1

Through intergration

Answer 2

You have to consider this as a solid sphere and then integrate from a to b right?

Answer 3

You have to consider this as a solid sphere and then integrate from a to b right?

Answer 4

Can you help? @ganeshie8 @zepdrix

Answer 5

I know the answer but don't know how to prove

Answer 6

This might help, Zupari. c: http://physics.stackexchange.com/questions/100444/why-is-the-moment-of-inertia-for-a-hollow-sphere-higher-than-a-uniform-sphere

Answer 7

Nope

Answer 8

center of gravity? .... wh... ut? 0_o

Answer 9

Nothing to do with moment of inertia lol

Answer 10

I think it's best that you define for us exactly what "center of gravity" is. @Zupari

Answer 11

Looks more like question for physicist, not mathematician lol.

Answer 12

Sorry i don't know the exact english word but i think thats the word

Answer 13

Centre of gravity of a hollow sphere is a/2 likewise you have to integrate and find the point of this object

Answer 14

the translation is fine :)
im just not familiar with the concept. hmm

Answer 15

is it a complete sphere or an hemisphere ?

Answer 16

hemishpere

Answer 17

because if it were a complete sphere, dont u think the center of gravity just lies at the center

Answer 18

ohk..

Answer 19

Complete sphere would be more trivial, but he still have to prove it either way.

Answer 20

answer is 3{(a+b)(a^2 + b^2)}/8( a^2 + ab + b^2)

Answer 21

do you mean (0, 0, 3{(a+b)(a^2 + b^2)}/8( a^2 + ab + b^2))

Answer 22

i think so

Answer 23

https://www.youtube.com/watch?v=UiAH-Ev6PRA watch this if u don't know the concept.

Answer 24

likewise you have to apply that to this boy.

Answer 25

dont know how but i

Answer 26

yoda