[问答题]
A uniform rod of mass M and len
a,g( hq(ydyy 3gth L can pivot freely (i.e., we ignore frictio
809tv. rc,6xepict v gf1;k.3gunpe m k8ef-mn) 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, deter
pv ukf c mnp.63te g8vf9ci0xe egk; -mr8,t1.mine (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.]
