[填空题]
Calculate the moment)tzl,7lyp7ohxe8 up6 of inertia pxrvgu7o,k 7xrkk x6ly*/m ;: of the array of point objects shown in Fig. 8–43 ab kkxgyr*kx76x p ; uvm,r7/l:oout (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?