[问答题]
A uniform rod of mass M and length L can pivot freely (i.e., we ignor
55zff/ uv0ygcvdvpg:4 kty(7e friction
7d:*fz 5ywhgl) about a hinge attached to a wall, as in Fig. 8–54. The rod is held hori
f5z: y *d7glhwzontally 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. [Hint: See Fig. 8–21g.]

