Q1) wo = initial angular velocity = 0
     a = angular acceleration = 2
rad/s^2
     w = final angular
velocity
  Â
Using fromula , W = wo +at = 2*t
Q2) M = mass = 60 kg
        Â
a) I = rotatinal inertia = MR^2/2Â Â , Â Â
where R = radius
                                   Â
= 30R^2
b) T = trouqe = I*a = (MR^2/2 )*2
                             Â
= MR^2
                            Â
= 60 R2
c) at t= 8s , w = 2t = 2*8 = 16 rad/s
    angular mometum = I*w =
(MR^2/2)*16Â Â = 8MR^2 = 480R^2
