A torsion pendulum is made from a disk of mass m = 7.1 kg and radius R = 0. A force of F = 41.5 N exerted on the edge of the disk rotates the disk...

A torsion pendulum is made from a disk of mass m = 7.1 kg and radius R = 0.67 m. A force of F = 41.5 N exerted on the edge of the disk rotates the disk 1/4 of a revolution from equilibrium.What is the torsion constant of this pendulum? What is the minimum torque needed to rotate the pendulum a full revolution from equilibrium? What is the angular frequency of oscillation of this torsion pendulum?