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axis.Hint: Turn the cone upside down and put the cone's symmetry axis into the z-axis of your coordinate system (like in Fig. 3.4 of our Textbook). Consider horizontal slices of thickness dz through the cone which carry the moment of inertia d I=\frac{1}{2} r^{2} d m with dm the mass of the slice/disk and the factor 1/2 because the slices are circular disks. The total moment of inertia of the cone is then obtained from I=\int d I

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