某图形面积为A,yc是其形心轴,y//yc且距离为a,则( )。
A: Iy=Iyc+a·A·A
B: Iy=Iyc+a·a·A
C: Iyc=Iy+a·A·A
D: Iyc=Iy+a·a·A
A: Iy=Iyc+a·A·A
B: Iy=Iyc+a·a·A
C: Iyc=Iy+a·A·A
D: Iyc=Iy+a·a·A
举一反三
- 给定图示正方形,则图形对形心轴y和y的惯性矩Iy1与Iy之间的关系为( )。[img=117x120]178698bf4479c0c.png[/img] A: Iy1 > Iy B: Iy1 = Iy C: Iy1 = 0.5Iy D: Iy1 < 0.5Iy
- 下面程序的运行结果是 iX=80,iY=25____。void main(){ int iX,iY;iX=80;iY=25;printf("iX=%d,iY=%d\n",iX,iY);printf("iX/iY=%d,iX%iY=%d\n",iX/iY,iX%iY);}
- void main() { int iX,iY,iM,iN; iX=10;iY=20; iM=iX++;iN=++iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); iM=iX– –;iN=– –iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); }
- 图示矩形截面对x、y,两形心轴的惯性矩分别为()。 A: I=(1/12)bh,Iy=(1/12)hb B: I=(1/12)bh,Iy=(1/12)hb C: I=(1/12)hb,Iy=(1/12)bh D: I=(1/12)hb,Iy=(1/12)bh
- #include "stdio.h" void main() { int iX,iY,iM,iN; iX=10;iY=20; iM=iX++;iN=iY++; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); iM=iX--;iN=--iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); }