[问答题]
A uniform rod of mass M
aml 8zr (c5v.nand le
qircl0g x52ts25 ox o/ngth L can pivot freely (i.e., we ignore friction) about a hinge attached to a wall, as in Fig. 8–54. The rod is hel
r25ost2 xq0x i g5/clod horizontally and then released. At the moment of release, determine (a) the angular acceleration of the rod, and (b) the linear acceleration of the tip of the rod. Assume that the force of gravity acts at the center of mass of the rod, as shown. [Hint: See Fig. 8–21g.]

