A solid wheel (solid cylinder) with mass 2.5 kg and a radius of 0.50 meter starts rotating (about an axis thru its center and perpendicular to the plane of the solid cylinder) from rest and has a constant angular acceleration of 2.5 radians/second^2. After 6.0 seconds the wheel has an angular velocity of 15 radians/second. Determine the torque required to produce this motion.