[问答题]
A uniform rod of mass M and length L can pivot freely (i.e., we igno
f2 z 00exnao6zc5 w8mq/c ,suv1fj x+lre 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. Assum
u1,l/csfjvx+ e that the force of gravity acts at the center of mass of the rod, as shown. [Hint: See Fig. 8–21g.]

