Engineering Statics

D-7


Two rods are connected by a frictionless collar at B. Knowing that the magnitude of the couple MA is 500 lb-in, determine (a) the couple MCrequired for equilibrium, (b) the corresponding components of the reaction at C.

A FBD of member AB is draw and the moment equation about 
solved.
A FBD of member src=images/D/d-07 is drawn and the geometric relationships 
at B established.
A moment equation is written about C to avoid the unknown 
force components at C.
Substituting yields the moment at C.