[问答题]
A uniform rod of mass M and length L can
,4 k -nqf:bcdd pivot freely
b9-iwvt;;gmv9 3 cl tl+2ons z (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 r
st+b3l v9-c gtv;l9;wzni m o2od, 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. [Hint: See Fig. 8–21g.]

