Physics - Rotation Question with Solution | TestHub

A wheel of radius $0.4\mathrm{m}$ can rotate freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of $4\mathrm{kg}$ is hung. An angular acceleration of $8\mathrm{rad}-{\mathrm{s}}^{-2}$ is produced in it due to the torque. Then, moment of inertia of the wheel is $\left(\mathrm{g}=10{\mathrm{ms}}^{-2}\right)$