COSMOS: Complete Online Solutions Manual Organization System
Chapter 3, Solution 54.
(
)
Have
M AD = λ AD ⋅ rB/ A × TBG
where
λ AD = ( 0.8 m ) i − ( 0.6 m ) k
rB/ A = ( 0.4 m ) i
TBG = TBG
JJJG
− ( 0.4 m ) i + ( 0.74 ) j − ( 0.32 m ) k
BG
= (1125 N )
BG
( − 0.4 m )2 + ( 0.74 m )2 + ( − 0.32 m )2
= − ( 500 N ) i + ( 925 N ) j − ( 400 N ) k
Then
M AD
0.8
0 − 0.6
= 0.4
0
0
− 500 925 − 400
or M AD = − 222 N ⋅ m
.