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Please take a look at this:

Calculate the rotational inertia of a section of a right circular cylinder of radius R that subtends an angle of 'theta knot' at the origin when the reference axis is at the origin and perpendicular to the section.

I tried to draw the picture in the attachment.

I tried to use the formula I=Integral(R^{2}*dm), with dm =density*dV

where V is the volume. I would like to know if I am in the good direction

Thank you for your help

B

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# Rotational inertia again!

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