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 brought from rest to an angular velocity ω = 1500 rpm in 20 revolutions by applying a constant torque M. Neglecting friction, determine the value of M needed to spin up the rotor as described.

Figure P8.20