• 2022-05-27
    图示的力分别在x、y、z三轴上的投影为( )。[img=277x232]17da6be1061d917.png[/img]
    A: Fx= - 2Ö2P/5, Fy=3Ö2P/10, Fz=Ö2P/2
    B: Fx=2Ö2P/5, Fy= - 3Ö2P/10, Fz= - Ö2P/2
    C: Fx=2Ö2P/5, Fy=3Ö2P/10, Fz=Ö2P/2