A \(680-\mathrm{kg}\) disk of radius \(1.2 \mathrm{~m}\) is mounted on a fixed axle. A force exerted on the disk causes a constant torque that gives the disk a rotational acceleration magnitude of \(0.30 \mathrm{~s}^{-2}\) for \(5.0 \mathrm{~s}\). If the disk had an initial rotational speed of \(4.5 \mathrm{~s}^{-1}\), how much work was done to provide the torque, assuming no energy is lost to friction?