[填空题]
Calculate the moment of inertia of the arraytf0rw7 v fysl*pn0 1- v9idv(hk8rudlhl( oj3oja9* ) of point objects shown in Fig. 8–43 a*uh8o)9jkdrl (laj 3o bout (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?