In: Mechanical Engineering
Determine the resultant couple moment acting on the beam. Solve the problem two ways: (a) sum moments about point O; and (b) sum moments about point A.
Solution
(a) sum moments about point O
+ MR =8cos45°(1.8)+8sin45°(0.3)+2cos30°(1.8)-2sin30°(0.3)
-2cos30°(3.3)-8cos45°(3.3)=-9.69N and m=9.69KN.m
(b) sum moments about point A.
MR=8sin45°(0.3)-8cos45°(1.5)-2cos30°(1.5)-2sin30°(0.3)
=-9.69N and m=9.69KN.m
ans. (a) MR=-9.69N and m=9.69KN.m
(b) MR=-9.69N and m=9.69KN.m