Fig. P2.39 a DA» DB DA and DC.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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I need help to solve only problem 2.40. Thank you

 

 

2.40 The pole for an antenna is held by three guy wires as shown. If the
resultant force exerted by these wires on the pole at D is to be a downward
force of 336 lb to avoid bending of the pole at its base 0, determine (a) the
tensions FDA, FDB, and Foc in these wires, (b) the angle 0 between wires
Fig. P2.39
D.
24 ft
DA
DB
DA and DC.
4 A transmission tower OD is guyed with three cables DA, DB, and DC
chown. The tower is so designed that the resultant force exerted by these
cables at D is R=-22.9j kN. Determine (a) the tensions F, FDR , and
Ee to be set in these cables, (b) the angle OAc between cables DA and DC,
(c) the angle O3c between cables DB and DC.
8 t
6 ft
12 ft
%3D
8 ft
DA
24 ft
12 ft
as
Fig. P2.40
es
84 m
42 m
48 m
63 m
A°
21 m
48 m
28 m
Fig. P2.41
Transcribed Image Text:2.40 The pole for an antenna is held by three guy wires as shown. If the resultant force exerted by these wires on the pole at D is to be a downward force of 336 lb to avoid bending of the pole at its base 0, determine (a) the tensions FDA, FDB, and Foc in these wires, (b) the angle 0 between wires Fig. P2.39 D. 24 ft DA DB DA and DC. 4 A transmission tower OD is guyed with three cables DA, DB, and DC chown. The tower is so designed that the resultant force exerted by these cables at D is R=-22.9j kN. Determine (a) the tensions F, FDR , and Ee to be set in these cables, (b) the angle OAc between cables DA and DC, (c) the angle O3c between cables DB and DC. 8 t 6 ft 12 ft %3D 8 ft DA 24 ft 12 ft as Fig. P2.40 es 84 m 42 m 48 m 63 m A° 21 m 48 m 28 m Fig. P2.41
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