Question

Find the moment of inertia of a hollow cone (mass M, base radius R) around its symmetry axis.

Answer 1

do u know how to calculate moment of inertia in general?

Answer 2

yes i know

Answer 3

and do u know what is M.I of a ring ? about its centre through an axis perpendicular to it?

Answer 4

yes mr^2

Answer 5

then u can cut that cone into small small rings.. ( a differential ring if u may). and then integrate it over the entire cone ;-)
think about it!

Answer 6

ok, i'll do, but what will final ans.

Answer 7

i dunno :P.. i haven't done it.. just try and post ur work.. !

Answer 8

so,funny.ok, i'll do and ll post ans :-)

Answer 9

it will \[\frac{ 1 }{2}MR ^{2}\]

Answer 10

seems legit.. so there u have it :D