• 2022-05-29
    图示的力分别在x、y、z三轴上的投影为()
    A: X=2√2P/5,Y=3√2P/10,Z=√2P/2
    B: X=2√2P/5,Y=-3√2P/10,Z=-√2P/2
    C: X=-2√2P/5,Y=3√2P/10,Z=√2P/2
    D: X=-2√2P/5,Y=-3√2P/10,Z=√2P/2