A disk with a rotational inertia of 5.0 kg·m2 and a radius of 0.25 m rotates on a fixed axis perpendicular to the disk and through its center. A force of 2.0 N is applied tangentially to the rim. As the disk turns through half a revolution, the work done by the force is:
This was another question on my test that I missed. I didn't know where to get started. I know the work done is the integral of the torque. However, I don't know how to get a function that I can integrate from this example. Any ideas?