[填空题]
Calculate the moment of inerr 6y6e+*s jb.s;oqek9e0fo8ff d*oe ftia of(upn hu b43mt1 the array of point objects shown in Fig. 8–43 abnmpu 4th1u (3bout (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?