Physics - Rotation Question with Solution | TestHub

Total angular momentum about O in case (a) and (b) is $2\mathrm{m}{\mathrm{L}}^2{\sin }^2\theta \omega \hat{\mathrm{k}}$.

Total angular momentum about O is $2\mathrm{m}{\mathrm{L}}^2{\sin }^2\theta \omega \hat{\mathrm{k}}$ in case (a) only.

Total angular momentum about O is $2\mathrm{m}{\mathrm{L}}^2{\sin }^2\theta \omega \hat{\mathrm{k}}$ in case (b).

In case (a) a horizontal torque must act to rotate system with constant $\omega$.