The body of weight W1 in Fig. 1 has a downward velocity of vo when a constant retarding to...

The body of weight W1 in Fig. 1 has a downward velocity of vo when a constant retarding torque T from a brake is applied. Total mass moment of inertia of the rotating body is I lb in. sec2. Neglect friction and the inertia of the rope and lower pulley. Show that the velocity of W after t seconds have elapsed is given by .

Figure 1