A Torsion Pendulum Consists of a Uniform Rod Hanging Horizontally

Multiple Choice

A torsion pendulum consists of a uniform rod hanging horizontally from thin wire tied to its center. When the wire is twisted through an angle θ, the wire exerts a torque τ = -γθ, where γ = 0.0016 Nm/rad. The rod has a mass of 35 grams and is 10 cm long. What is the period of the torsional oscillations of the pendulum?

A) 0.85 s
B) 1.4 s
C) 0.99 s
D) 2.1 s
E) 0.023 s