Physics - Circular Motion Question with Solution | TestHub

The angular position of a line of a disc of radius$\mathrm{r}=\mathrm{6 }\mathrm{c}\mathrm{m}$is given by$\mathrm{\theta }=10-5\mathrm{t}+4{\mathrm{t}}^{\mathrm{2 }}\mathrm{r}\mathrm{a}\mathrm{d}$, the average angular velocity between$\mathrm{1 }\mathrm{s}$and$\mathrm{3 }\mathrm{s}$is