[问答题]
A uniform rod of mass M and l
4b 0oiq1 ib/ d7avfeb5ength L can pivot fr
4y yy:ha(.+su. gxcsveely (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 rod. Assume that the force of gravity acts at the center of mass of the rod, as shown
:+cyyx4yg(.sus h va. . [Hint: See Fig. 8–21g.]

