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why is only the position vector ab used? why is the force in cable cad not used?

why is only the position vector ab used? why is the force in cable cad not used?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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why is only the position vector ab used?

why is the force in cable cad not used?

(a) Moment of all the forces in the given structure about point A, we have M, = AB×TD + AB×TE 3(120k ×(607 – 80K)) + (120 ×(607– 80K)) =(72007 – 72007)N-1 Moment of all the forces in the structure about point A, M =(-72007 + 7200] )N ·mm
Transcribed Image Text:(a) Moment of all the forces in the given structure about point A, we have M, = AB×TD + AB×TE 3(120k ×(607 – 80K)) + (120 ×(607– 80K)) =(72007 – 72007)N-1 Moment of all the forces in the structure about point A, M =(-72007 + 7200] )N ·mm
Structure OAB is built in at point O and supports forces from two cables. Cable CAD passes through a frictionless ring at point A, and cable DBE passes through a frictionless ring at point B. If the force in cable CAD is 250 N and the force in cable DBE is 100 N, use a vector approach to determine (a) the moment of all cable forces about point A. 120 mm 80 mm (b) the moment of all cable forces about point 0. 150 mm 150mm C. 60 mm
Transcribed Image Text:Structure OAB is built in at point O and supports forces from two cables. Cable CAD passes through a frictionless ring at point A, and cable DBE passes through a frictionless ring at point B. If the force in cable CAD is 250 N and the force in cable DBE is 100 N, use a vector approach to determine (a) the moment of all cable forces about point A. 120 mm 80 mm (b) the moment of all cable forces about point 0. 150 mm 150mm C. 60 mm
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