Help me with this question please

q2
kinematic equation for rotation.
4s=> 3 radians
tan accn = r times ang accn
ang acc 30/20
tan accn = 0.18m/s/s
q2
kinematic equation for rotation.
4s=> 3 radians
tan accn = r times ang accn
ang acc 30/20
tan accn = 0.18m/s/s