1. The problem statement, all variables and given/known data An object is formed by attaching a uniform, thin rod with a mass of mr = 6.91 kg and length L = 4.88 m to a uniform sphere with mass ms = 34.55 kg and radius R = 1.22 m. Note ms = 5mr and L = 4R. What is the moment of inertia of the object about an axis at the left end of the rod? 2. Relevant equations I came up with these equations... I_rod = (1/3) * mr * L^2 I_sphere = (2/5) * ms * R^2 + ms * (L + R) 3. The attempt at a solution I think that the moment of inertia for the system is equal to the sum of I_rod and I_sphere. So I simply plugged in the relevant variables and got the answer of 286.177 kg-m^2 which is wrong. Are the equations above correct?