1. The problem statement, all variables and given/known data A uniform solid sphere has a moment of inertia I about an axis tangent to its surface. What is the moment of inertia of this sphere about an axis through its center? 2. Relevant equations Ip = Icm + Md2 Isolid sphere = 2/5MR^2 3. The attempt at a solution This is what I tried: Ip = 2/5MR^2 + MR^2 =7/5MR^2 I'm not sure what I'm supposed to do with this. I know that the correct answer is 2/7 but I don't know how you get that answer.