1nice question :)
generally they say that moment of inertia cannot be more than MR*2.but there is a case where it can be greater than MR*2.can anyone describe one such case? nishant bhai please dont answer this.
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6 Answers
1moment of inertia of a ring about an axis parallel to axis passing through centre and through the circumference:
using parallel axis theorem,
Ixx' = Ic + Md2
Ixx' = Mr2 + Mr2 = 2Mr2
thus, moment of inertia is more than MR2
(is this what u actually asked for???)
39that answer was too obvious yaar shreyan.i want some physical situation without any use of these parallel axis theorem.
1u can see the moment of inertia of a ring alontg its srim von vertical axis
62Finally Am posting the answer cos no one else did :) (Sorry b555.. and sorry i dont know ur name either :D)
This is not a very easy visualisation....
take a Sphere of variable density.. very high density at the center and lower density as you go out.. Find the I of this..
Or for that matter an Atom.. The Protons and Neutrons at the center and electrons aroudn it..