一力F作用在平面OABC上(如图所示),于是力F对OX、OY、OZ三轴之矩应为( )。7b4ea2d834d128bb1ece46f9d7356ceb.png
举一反三
- 一力F作用在平面OABC上(如图所示),于是力F对OX、OY、OZ三轴之矩应为()。 A: mx(F)=0,my(F)=0,mz(F)=0 B: mx(F)=0,my(F)=0,mz(F)≠0 C: mx(F)≠0,my(F)≠0,mz(F)=0 D: mx(F)≠0,my(F)≠0,mz(F)≠0
- 力F的作用线在OABC平面内,如图所示,则F对Ox、Oy、Oz轴之矩为() A: Mx(F)≠0My(F)≠0Mz(F)≠0 B: Mx(F)≠0My(F)≠0Mz(F)=0 C: Mx(F)=0My(F)≠0Mz(F)≠0 D: Mx(F)≠0My(F)=0Mz(F)≠0
- 力F作用在OABC平面内,x轴与OABC平面成q 角(q = 60°),如图,则力F对三轴之矩为。http://p.ananas.chaoxing.com/star3/origin/4f9190ec68e289764705b8be02f83905.png
- 图示力F作用线在OABC平面内,则力F对空间直角坐标系Ox,Oy,Oz轴之矩,正确的是( )。[img=274x233]17e0ba6794e0fd7.png[/img] A: mx(F)=0,其余不为零 B: my(F)=0,其余不为零 C: mz(F)=0,其余不为零 D: mx(F)=0,my(F)=0,mz(F)=0
- 如图示,力F作用在OABC平面内,F对x轴、y轴、z轴之矩为( )。5b8b712f7fd0d93b4712e59e4cbe6744.png