1. The problem statement, all variables and given/known data What is the rotational inertia of a solid iron disk of mass 46 kg, with a thickness of 6.31 cm and radius of 19.4 cm, about an axis through its center and perpendicular to it? 2. Relevant equations either 1/2MR^(2) or I = sigma (1->N) Mi x Ri^(2) 3. The attempt at a solution I don't know what to do!!!