1. The problem statement, all variables and given/known data The shows an arrangement of 15 identical disks that have been glued together in a rod-like shape of length L = 1.0000 m and (total) mass M = 100.0 mg. The disks are uniform, and the disk arrangement can rotate about a perpendicular axis through its central disk at point O. (a) What is the rotational inertia of the arrangement about that axis? (b) If we approximated the arrangement as being a uniform rod of mass M and length L, what percentage error would we make in calculating the rotational inertia? M = 100.0 mg = 1×10-4 kg L = 1.0000 m # of disks = 15 2. Relevant equations Inertia of a disk about a central diameter I = (MR2)/2 Inertia of set of particles I = ∑miri2 3. The attempt at a solution Itotal = (MR2)/4 + ∑miri2 Itotal = ML2 / 4⋅302 + (2M/15)(1 + 4 + 9 + 16 + 25 + 36 + 49)(L/15) Itotal = 8.298 kg - m2 Did I have the right solution?