Engineering Statics

E-2


A 10 foot boom is acted upon by the 840 pouns force shown. Determine the tension in each cable and the reaction at the ball and socket joint at point A.

The length of each cable is 11 feet from geometry.  A 
FBD of the boom is drawn.
The components of the tension in cable BD are proportional 
to the geometry.
The components of the tension in cable BE are proportional 
to the geometry.

The components of the tension in cable AD are proportional 
to the geometry.
Summing forces in the x direction: