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
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
举一反三
- 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
- 图示的力分别在x、y、z三轴上的投影为( )[img=260x229]1786983fb13c0a2.png[/img] A: X= - 3Ö2P/10, Y= 2Ö2P/5, Z= - Ö2P/2 B: X= - 2Ö2P/5, Y= 3Ö2P/10, Z= - Ö2P/2 C: X= 3Ö2P/10, Y= - 2Ö2P/5, Z= - Ö2P/2 D: X= 2Ö2P/5, Y= 3Ö2P/10, Z= - Ö2P/2
- 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
- 图示的力分别在x、y、z三轴上的投影为( )[img=260x229]17da6bdfca38d6f.png[/img] A: Fx= - 3Ö2P/10, Fy= 2Ö2P/5, Fz= - Ö2P/2 B: Fx= - 2Ö2P/5, Fy= 3Ö2P/10, Fz= - Ö2P/2 C: Fx= 3Ö2P/10, Fy= - 2Ö2P/5, Fz= - Ö2P/2
- 图示桁架结构杆①的轴力为:() A: -P/2 B: P C: 3/2P D: 2P