[填空题]
Calculate the moment of iqij0 w+w h*78 k6pxqfbj ;(x8ezr rgr.j)hqog ;sr3c+fn 4c 6znertia of the array of point objects shown in Fig. 8–43 about) +jo4ncg s6;3qzfhrc (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?