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How is the polar moment of inertia in a rod calculated?
Thanks.
Thanks.
What is the formula for rotational moment of inertia?Well, at least now I can understand your confusion. However, it doesn't literally ask for the polar moment of inertia (a.k.a area moment of inertia), but for the polar mass moment of inertia. I see that used for the rotational moment of inertia, so with the context of b (ii) and b(iii) that seems the most logical choice.
I've found this... http://hyperphysics.phy-astr.gsu.edu/hbase/mi2.html#irod3Can't imagine you haven't seen it before ! What did you use for 4a ?
## I=\int dI = {\displaystyle \int_0^M r^2 \; dm}##