[填空题]
Calculate the moment oh 9:g1(i2 1fd dwlbqmcf inertia of the arra d1g 2y7qw06fglyjeuv7vj : r(y of point objects shown in Fig. 8–43 ab1yvy70gjr:e2fj wd(6 l ug7 vqout (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?