There is one mistake, I think.
One slice has of course I = m(a^2)/(12n) but not by this axis! the axis is in the centre of plate and every slice has I = m(a^2)/(12n) + \frac{m}{n} * r^2 from Steiner theory when r ist distance from axis.
Ok, I know that, but the problem is: how can I count it without integrals? I must sum up all the slices' distance from axis, but how am I supposed to do it without integrals?
Hi!
I've got a problem with this:
Count moment of inertia for rectangular plate a x b, if you know that moment of inertia of thin rod is \frac{1}{12}ml^2 . Do not use integrals!, others mathematical functions required (I can proof this moment by integrals, but this is not issue). I know that...