free-body diagram of the joint on either of the cut is known, we can apply the equations of equilibrium to that part of the member to determine the forces at the cut section. Since only three equilibrium equations (ΣΕ 0, Σ F, = 0, and Σ Mo = 0) can be applied to the free-body diagram of any segment, we should try to select a cut that passes through no more than three members of the truss in which the forces are unknown. Note that the moment equation can be written multiple times, but there are still only 3 independent equilibrium equations available. For the Howe bridge truss shown, d = 11 ft, F₁ = 2950 lb, F₂ = 1950 lb, F3 = 2550 lb, and F₁ = 3650 lb. (Figure 2) Figure < 2 of 2 wit H G El Part C - Determining the forces in three members on the left-hand side of the truss Determine the forces in members HI, BH, and BC. Express the magnitudes of the forces in pounds to three significant figures. Separate your answers with commas. ► View Available Hint(s) FBC =, FHI = FBH = Submit IVE ΑΣΦ 41 vec Part D - The Sense of the Forces ? lb, lb, lb State if the members considered in part C are in tension or compression. Complete each sentence by dragging the appropriate word into the blank. The words can be used
free-body diagram of the joint on either of the cut is known, we can apply the equations of equilibrium to that part of the member to determine the forces at the cut section. Since only three equilibrium equations (ΣΕ 0, Σ F, = 0, and Σ Mo = 0) can be applied to the free-body diagram of any segment, we should try to select a cut that passes through no more than three members of the truss in which the forces are unknown. Note that the moment equation can be written multiple times, but there are still only 3 independent equilibrium equations available. For the Howe bridge truss shown, d = 11 ft, F₁ = 2950 lb, F₂ = 1950 lb, F3 = 2550 lb, and F₁ = 3650 lb. (Figure 2) Figure < 2 of 2 wit H G El Part C - Determining the forces in three members on the left-hand side of the truss Determine the forces in members HI, BH, and BC. Express the magnitudes of the forces in pounds to three significant figures. Separate your answers with commas. ► View Available Hint(s) FBC =, FHI = FBH = Submit IVE ΑΣΦ 41 vec Part D - The Sense of the Forces ? lb, lb, lb State if the members considered in part C are in tension or compression. Complete each sentence by dragging the appropriate word into the blank. The words can be used
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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This problem I have found frustrating but I think I am just messing up the algibra
Transcribed Image Text:free-body diagram of the joint on either
of the
cut is known, we can apply the equations of equilibrium
to that part of the member to determine the forces at the
cut section. Since only three equilibrium equations
(ΣΕ 0, Σ F, = 0, and Σ Mo = 0) can be
applied to the free-body diagram of any segment, we
should try to select a cut that passes through no more
than three members of the truss in which the forces are
unknown. Note that the moment equation can be written
multiple times, but there are still only 3 independent
equilibrium equations available.
For the Howe bridge truss shown, d = 11 ft,
F₁ = 2950 lb, F₂ = 1950 lb, F3 = 2550 lb, and
F₁ = 3650 lb.
(Figure 2)
Figure
A
+
B
H
G
D
< 2 of 2
F
dddd-
E
Part C - Determining the forces in three members on the left-hand side of the truss
Determine the forces in members HI, BH, and BC.
Express the magnitudes of the forces in pounds to three significant figures. Separate your answers
with commas.
► View Available Hint(s)
FBC =, FHI =
FBH =
Submit
IVE ΑΣΦ 41
vec
Part D - The Sense of the Forces
?
lb, lb,
lb
State if the members considered in part C are in tension or compression.
Complete each sentence by dragging the appropriate word into the blank. The words can be used
more than once.
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