Two wheels have the same mass and radius of 5.0 kg and 0.39 m,respectively. One has
(a) the shape of a hoop and the other
(b) theshape of a solid disk. The wheels start from rest and have aconstant angular acceleration with respect to a rotational axisthat is perpendicular to the plane of the wheel at its center. Eachturns through an angle of 14 rad in8.2 s. Find the net external torque thatacts on each wheel.