4. Use the method of joints to determine the forces in members AD, AB, AC, BC, and CD of the simple planar truss given in the figure, which is kept in static equilibrium by a pin at D and a roller at E. Also state whether each truss member is in tension or compression. 5 ft → - 5 ft 12 ft D 3 kip A 7 ft O 400 lb B E

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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4. Use the method of joints to determine the forces in members AD, AB, AC, BC, and CD of the
simple planar truss given in the figure, which is kept in static equilibrium by a pin at D and
a roller at E. Also state whether each truss member is in tension or compression.
5 ft →
7 ft
- 5 ft
12 ft
D
3 kip A
O
400 lb
B
E
Transcribed Image Text:4. Use the method of joints to determine the forces in members AD, AB, AC, BC, and CD of the simple planar truss given in the figure, which is kept in static equilibrium by a pin at D and a roller at E. Also state whether each truss member is in tension or compression. 5 ft → 7 ft - 5 ft 12 ft D 3 kip A O 400 lb B E
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When you substitute AD in step 5, why do you get rid of the negative? In step 4 you keep it negative when finding CD.

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