如图所示力F(矢量)对O点的矩为()。[img=283x133]17e0beb0078930f.png[/img]
A: F·L
B: -F·L
C: F/L
D: 0
A: F·L
B: -F·L
C: F/L
D: 0
举一反三
- 如图,力F对o点力矩是()[img=200x150]17e441dbcadf2b6.png[/img] A: F·l B: -F·l C: F·b D: -F·b
- 图示结构,其对A点之矩的平衡方程为( )。[img=192x150]180328f61d22d6f.png[/img] A: SMA(F) = m + P × L/2 + mA = 0 B: SMA(F) = -m - P × L/2 = 0 C: SMA(F) = -mL - P × L/2 + mA = 0 SMA(F) = -mL - P × L/2 + mA = 0 D: SMA(F) = -m - P × L/2 + mA = 0
- 图示结构,其对A点之矩的平衡方程为() A: mA(F)=m+PsinθL/2+2Qa+mA=0 B: mA(F)=-m-PsinθL/2+Qa=0 C: mA(F)=-mL-PL/2+Qa/2+mA=0 D: mA(F)=-m-PsinθL/2+Qa+mA=0
- 图示结构,其对A点之矩的平衡方程为() A: m(F)=m+PsinθL/2+2Q+m=0 B: m(F)=-m-PsinθL/2+Q=0 C: m(F)=-mL-PL/2+Q/2+m=0 D: m(F)=-m-PsinθL/2+Q+m=0
- 下图中F=100N,L=2m,力F对点O之矩为()N.m