A body initially at rest ($\theta =0$ and $\omega =0$ at $t=0$ ) and is accelerated over a circular path of radius $R=1 m$ as per the relation, $\alpha =120t^2-48t+16 \raisebox{1ex}{$rad$}\!\left/ \!\raisebox{-1ex}{$s^2$}\right.$. At time $t=1 sec$