1. The problem statement, all variables and given/known data http://img232.imageshack.us/img232/4976/physicswe5.jpg [Broken] total mass of the rod = 4m m = 0.4kg; b = 0.4m; a = 1.0m rod is thin i need to find the mass moment of inertia for the rotating rod relative to z-axis.. 2. Relevant equations (1/12)ML² 3. The attempt at a solution for the rod which lies on y axis, i could calculate the mass moment of inertia by using the above equation which will lead me to the following answer (1/12)*2*0.40*0.8² = 0.0427 but what should i do with the other parts of the rod which are parallel with the z-axis?.. or could i apply the following equation?: (1/24)*M*L²*sin (2φ) where φ = 45 thx in advance..