A boat's propeller has a rotational inertia of 4.0 kg . ma. After a constant torque is applied for 12 s, the rad rad propeller's angular speed changes from a clockwise 6.0 to a counterclockwise 6.0 S S What was the torque applied to the propeller? 6.0 kg.m^2/s 5.0 kg.m^2/s 7.0 kg.m^2/s 4.0 kg.m^2/s