[填空题]
Calculate the moment of inertia of to2zw1-8cw xzvhe array of point objects shown in Fmlikj01k :1coig. 8–43101 imkj:clok about (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?