Learning Goal: To learn to apply the method of joints to a truss in a systematic way and thereby find the loading in each member of the truss. In analyzing or designing trusses, it is necessary to determine the force in each member of the truss. One way to do this is the method of joints. The method of joints is based on the fact that if the entire truss is in equilibrium, each joint in the truss must also be in equilibrium (i.e., the free-body diagram of each joint must be balanced). Consider the truss shown in the diagram. The applied forces are P₁= 570 lb and P₂ = 350 lb and the distance is d = 8.50 ft. .30⁰ d B D F P₁ 30° d

International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter6: Beams And Cables
Section: Chapter Questions
Problem 6.76P: The 50-ft measuring tape weighs 2.4 lb. Compute the span L of the tape to four significant figures.
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Learning Goal:
To learn to apply the method of joints to a truss in a systematic way and thereby find the loading in each member of the truss.
In analyzing or designing trusses, it is necessary to determine the force in each member of the truss. One way to do this is the method of joints. The
method of joints is based on the fact that if the entire truss is in equilibrium, each joint in the truss must also be in equilibrium (i.e., the free-body
diagram of each joint must be balanced).
Consider the truss shown in the diagram. The applied forces are P₁ = 570 lb and P₂ = 350 lb and the distance is d = 8.50 ft.
Part A - Where to Start the Analysis
For this truss, what joint is the best place to start the analysis?
Select the correct answer.
Joint A
Joint B
Joint C
Joint D
Joint E
Submit Request Answer
30⁰
d
B
D
→
P₁
30°
d
Transcribed Image Text:Learning Goal: To learn to apply the method of joints to a truss in a systematic way and thereby find the loading in each member of the truss. In analyzing or designing trusses, it is necessary to determine the force in each member of the truss. One way to do this is the method of joints. The method of joints is based on the fact that if the entire truss is in equilibrium, each joint in the truss must also be in equilibrium (i.e., the free-body diagram of each joint must be balanced). Consider the truss shown in the diagram. The applied forces are P₁ = 570 lb and P₂ = 350 lb and the distance is d = 8.50 ft. Part A - Where to Start the Analysis For this truss, what joint is the best place to start the analysis? Select the correct answer. Joint A Joint B Joint C Joint D Joint E Submit Request Answer 30⁰ d B D → P₁ 30° d
Part F - The Forces in the Members at Joint B
Having found Fcp in the analysis of joint C and FDB in the analysis of joint D, there are now only two unknown forces acting on joint B.
Determine the two unknown forces on joint B.
Express the magnitudes of the forces to three significant figures. Separate your answers with a comma.
FBA=, FBE =
Submit Request Answer
IVE ΑΣΦ
Part G The Sense of the Forces
Submit
tension
State if the members considered in part F are in tension or compression.
Complete each sentence by dragging the appropriate word into the blank. The words can be used more than once.
compression
vec ←
Request Answer
Member BA is in
?
Member BE is in
lb, lb
Reset Help
Transcribed Image Text:Part F - The Forces in the Members at Joint B Having found Fcp in the analysis of joint C and FDB in the analysis of joint D, there are now only two unknown forces acting on joint B. Determine the two unknown forces on joint B. Express the magnitudes of the forces to three significant figures. Separate your answers with a comma. FBA=, FBE = Submit Request Answer IVE ΑΣΦ Part G The Sense of the Forces Submit tension State if the members considered in part F are in tension or compression. Complete each sentence by dragging the appropriate word into the blank. The words can be used more than once. compression vec ← Request Answer Member BA is in ? Member BE is in lb, lb Reset Help
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