A Disk of Moment of Inertia 80 Kg

Multiple Choice

A disk of moment of inertia 80 kg.m² is free to rotate about its axis (through the center, perpendicular to the plane of the disk, which is set vertical) . To increase its angular velocity uniformly from rest to 5.0 rad/s in 20.0 s, the torque applied is

A) 8.0 * 10³ N.m.
B) 3.2 *10² N.m.
C) 20 N.m.
D) 32 N.m.
E) 0.80 N.m.