1. The problem statement, all variables and given/known data The rotational inertia of a uniform thin rod about its end is ML2/3, where M is the mass and L is the length. Such a rod is hung vertically from one end and set into small amplitude oscillation. If L = 1.0 m this rod will have the same period as a simple pendulum of length: 2. Relevant equations 3. The attempt at a solution My original plan was to use a system of equations with: T = sqrt(I/k) (oscillation, where k is torsion constant) and T = 2pi(sqrt(L/g)) (simple pendulum.) However, I don't know the torsion constant and have no means to find it. What's my first step?