Physics - Rotation Question with Solution | TestHub

M. I. of uniform circular disc about an axis and perpendicular to the plane is: $$I_C=\frac{1}{2}M{R}^2$$ Using the theorem of parallel axis. M. I. of uniform circular disc about an axis touching the disc at it diameter is: $$\begin{array}{rl}I& =I_C+M{R}^2\\ & =\frac{1}{2}M{R}^2+M{R}^2\\ & =\frac{3}{2}M{R}^2.\end{array}$$