A wheel with rotational inertia I is mounted on a fixed, fricitonless axle. The angular speed w of the wheel is increased from zero to w_f in a time interval T.
1: What is the average net torque on the wheel during the time interval, T?
a) w_f/T
b)w_f/T^2
c) Iw_f^2/T
d)Iw_f/T^2
e)Iw_f/T
2: What is the average power input to the wheel during this time interval T?
a) Iw_f/2T
b_Iw_f^2/2T
c)Iw_f^2/2T^2
d)I^2w_f/2T^2
e)I^2w_f^2/2t^2
