[问答题]
A uniform rod of mass M a
3pkqi i1r(f;lnd length L c
3nfnt 5lv.q0*n s bcq(qow- 1van pivot freely (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
* o vf3q5 qncvn.0qws n(tb1-lof gravity acts at the center of mass of the rod, as shown. [Hint: See Fig. 8–21g.]

