[填空题]
Calculate the moment of ine. kvg-e mwmg scflzq.,q2)i4;rtia of the array ofvg9 37.kkrdi m.a;or7 okzi. n point objects shown in Fig. 8–43 about7.dr ra7ko3 ok.n.;izkgi m 9v (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?