• 2022-05-27
    图示的力分别在x、y、z三轴上的投影为( )。[img=277x232]1786983f925fb81.png[/img]
    A: X=2Ö2P/5, Y=3Ö2P/10, Z=Ö2P/2
    B: X=2Ö2P/5, Y= - 3Ö2P/10, Z= - Ö2P/2
    C: X= - 2Ö2P/5, Y=3Ö2P/10, Z=Ö2P/2
    D: X= - 2Ö2P/5, Y= - 3Ö2P/10, Z=Ö2P/2