§13-1质点和质点系的动量矩 L质点的动量矩 M0()=r×m MO(m)=mwh=2△OAB Mo(my Mm}→定位量 A(x,y,=) LMO(mv)l=M(1. 质点的动量矩 M mv r mv O ( ) =  §13-1 质点和质点系的动量矩 Mo (mv) O A(x,y,z) B r mv h y x z MO(mv) =mvh=2△OAB MO(mv) 定位矢量 [M (mv)] M (mv) O z = z