A turbine rotor with weight W = 3000 lb, center of mass at the fixed point G, and radius o...

A turbine rotor with weight W = 3000 lb, center of mass at the fixed point G, and radius of gyration kG = 15 ft is spinning with an angular speed ω = 1200 rpm when a braking system is engaged that applies a constant torque M = 3000 ft·lb. Determine the number of revolutions needed to bring the rotor to a stop.

Figure P8.21