[问答题]
A uniform rod of mass M and length L can pivot freely (i.
yqsr6q(6l+teab: 2ei e., we ignore fricti
p6q vexb r-4d-.9c imhon) about a hinge attached to a wall, as in Fig. 8–54. The rod is held horizontally and then released. At the moment of release, determine (a) the angular acceleration of the rod, and (b) the linear acceler
9b i d prcxh-q4.-e6vmation 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.]

