問題 5

A uniform thin rod has mass $M$, length $L$, and moment of inertia $I_{\text{cm}} = \frac{1}{12}ML^2$ about its center. What is its moment of inertia about an axis through one end?

1. $\frac{1}{6}ML^2$
2. $\frac{1}{4}ML^2$
3. $\frac{1}{3}ML^2$
4. $\frac{1}{2}ML^2$