[问答题]
A uniform rod of mass
b+/t;psh u /cy M
7xfmj2 lj2 z:doy-4 mr and length L can pivot freely (i.e., we ignore friction) 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 acceleration of the tip of the ro
xj 22:dl ymo fz4-jrm7d. Assume that the force of gravity acts at the center of mass of the rod, as shown. [Hint: See Fig. 8–21g.]

