**The problem and solution is attached as moment of inertia.** **The equations for moment of inertia of known homogeneous solids is also attached** I'm having some trouble grasping this concept. I hope someone can help clarify some things for me. Looking at the problem I realized I would have to use the parallel axis theorem, but after that the trouble begins. (I = Ig + m*d^2) "Deterimine the wheel's M of I about an axis perpendicular to the page and passing thru pt A." What does this mean? What is it saying? And a related question to the above: Why when calculating M of I for the thin ring (Homogeneous solids jpeg) do you use Izz = m*r^2 instead of Ixx or Iyy? Same question for the slender rod. How do you know which one to use? I realize I've said a lot, but I hope someone can give me some pointers. Thanks.