「例1滑轮A:m1,R1,R1=2R2, 滑轮B:m2,R2,l2;物体C:m3 M YO A 求系统对O轴的动量矩 解:L Loath 24 O OB 十 B 11+(2O2+m2v2R2)+m3v3R2 13 Ro =(2+2+m2+m3)R2 R 2 R 66 3 2 2 2 1 1 2 1 v = v = R = R 2 2 3 2 3 2 2 2 2 1 ( m m )R v R I R I LO = + + + LO =LOA +LOB +LOC 1 1 2 2 2 2 2 3 3 2 = I + (I + m v R ) + m v R 解: [例1] 滑轮A:m1,R1,R1=2R2,I1 滑轮B:m2,R2,I2 ;物体C:m3 求系统对O轴的动量矩