일반물리학 1 — Rotation: Problem 36

36 Figure 10-24a shows a disk that can rotate about an axis at a radial distance $h$ from the center of the disk. Figure 10-24b gives the rotational inertia $I$ of the disk about the axis as a function of that distance $h$, from the center out to the edge of the disk. The scale on the $I$ axis is set by $I_A = 0.050 \text{ kg} \cdot \text{m}^2$ and $I_B = 0.150 \text{ kg} \cdot \text{m}^2$. What is the mass of the disk?