A circular disk of radius R meter and mass M kg is rotating around the axis perpendicular to the disk. An external torque is applied to the disk such…

A circular disk of radius R meter and mass M kg is rotating around the axis perpendicular to the disk. An external torque is applied to the disk such that $\displaystyle \theta(\mathrm{t})=5 \mathrm{t}^2-8 \mathrm{t}$, where $\displaystyle \theta(\mathrm{t})$ is the angular position of the rotating disc as a function of time t. How much power is delivered by the applied torque, when $\displaystyle \mathrm{t}=2 \mathrm{~s}$ ?