[问答题]
A uniform rod of mass M and length L can pi
oc;,toz px83hmq 9qr3vot freely (i.e., we ignore fr
lx pmn.xe)dl)f 3r/,diction) 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 grav
)d p3mer nlx/.dl xf),ity acts at the center of mass of the rod, as shown. [Hint: See Fig. 8–21g.]

