[填空题]
Calculate the moment of inertia wb)b-sr l.dv9of the arriwd1rbk0 xx 4-,ukkj1ay of point objects shown in Fig. 8–43 x4irdw1u1k,x -k bk0jabout (a) the vertical axis, $kg \cdot m^2$ (b) the horizontal axis. Assume m=1.8 kg,M=3.1kg and the objects are wired together by very light, rigid pieces of wire. The array is rectangular and is split through the middle by the horizontal axis. $kg \cdot m^2$ (c) About which axis would it be harder to accelerate this array?