A flat uniform circular disk has a mass of 4.00 kg and a radius
of 55.0 cm. It is suspended in a horizontal plane by a vertical
wire attached to its center. If the disk is rotated 2.00 rad about
the wire, a torque of 0.0700 N · m is required to maintain the disk
in this position.
(a) Calculate the rotational inertia of the disk about the
wire.
kg · m2
(b) Calculate the torsion constant.
N · m
(c) Calculate the angular frequency of this torsion pendulum when
it is set oscillating.
rad/s