圖示的力分別對x、y、z三軸之矩為()
A.A B.B C.C D.D
圖示的力分別在x、y、z三軸上的投影為()
A.X=-3√2P/10,Y=2√2P/5,Z=-√2P/2; B.X=-2√2P/5,Y=3√2P/10,Z=-√2P/2; C.X=3√2P/10,Y=-2√2P/5,Z=-√2P/2; D.X=2√2P/5,Y=3√2P/10,Z=-√2P/2.
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