Question

40. (II) Calculate the moment of inertia of the array of point objects shown in Fig. 10-53 about (a) the vertical axis, and (b) the horizontal axis. Assume m = 2.2 kg, M = 3.1 kg, 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. (c) About which axis would it be harder to accelerate this array?

Answer 1

Stutien 나0. m 2.2 ka, M = 3.1 kg 0 5omk 50m 2. M C0.s0)M(r00)+ m/00 (a) (0.50) 4Mym) Ly(0.29) (w+ M = (0 .25) ( 5* 3.1 + 5X2.2) 6.625 kg.m Ty (mM)(2) 0-25)= 5.3) (2) (0.29) 0 6625 k.m2 hander to accelerale ty As I (c) .Ty avay about y anis. (Vent al ans 48 0300 Fym, Wf M 3.80 ks R=0.07)0 m . 20 N.m 2다 MR2 ap 20x A

hen p 0. (n:)mi= 0 Angular displacemant se 1 2 2 10 300x2) 60 46 u2.92 ad 2 .20 X 2 ( 3.80x0.07 0 738.94 evolutious AB Time teen t atop 8.61 S