COSMOS: Complete Online Solutions Manual Organization System
Chapter 3, Solution 12.
with d AB =
( 42 mm )2 + (144 mm )2
= 150 mm
sin θ =
42 mm
150 mm
cosθ =
144 mm
150 mm
and FAB = − FAB sin θ i − FAB cosθ j
=
2.5 kN
( − 42 mm ) i − (144 mm ) j
150 mm
= − ( 700 N ) i − ( 2400 N ) j
Also rB/C = − ( 0.042 m ) i + ( 0.056 m ) j
Now M C = rB/C × FAB
= ( − 0.042 i + 0.056 j) × ( − 700 i − 2400 j) N ⋅ m
= (140.0 N ⋅ m ) k
or
.
M C = 140.0 N ⋅ m