[填空题]
Calculate the moment of inertia of the array o3d 5 yw9ho*js :;lfmd:hrwu e8f point :8mev b8ycl;tf9ex3uobjects shown in Fig. 8–43 a9lc8e:e8fb mt3 v y;uxbout (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?