Problem #4 (35 points): The Howe roof truss is supported by a pinned connection at A and by a roller at G. Forces are imposed at several joints as shown below. 600 lb 800 lb 800 lb D 1000 lb E F 9 ft (a) Identify all zero-force members (if any) by inspection. (b) Find the forces in members CD, CK, LK, BC, and BL. Indicate whether each member is in tension or compression. M L K H 6 ft ik 6 ft 6 ft 6 ft 6 ft 6 ft

Problem #4 (35 points): The Howe roof truss is supported by a pinned connection at A and by a roller at G. Forces are imposed at several joints as shown below. 600 lb 800 lb 800 lb D 1000 lb E F 9 ft (a) Identify all zero-force members (if any) by inspection. (b) Find the forces in members CD, CK, LK, BC, and BL. Indicate whether each member is in tension or compression. M L K H 6 ft ik 6 ft 6 ft 6 ft 6 ft 6 ft

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter5: Three-dimensional Equilibrium

Section: Chapter Questions

Problem 5.26P: The figure shows the FBD of a portion of the space truss shown in Fig. P5.25. Use this FBD to find...

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2) A cantilevered truss is loaded as shown below. Using method of sections determine the force in member BC. Leave your answer in terms of P. Specify tension (T) or compression (C). (FYI, you do not need a calculator to do this problem.) (Hint: you do not need to find the support reactions to do this problem.) Ans: FBC = (9P)/4 (T) 6 m 6 m 4 m D E 3 m 6 m 3 m
For the next Trusses, compute the axial forces in the selected sections. Compare the result with the method of joints. (Check the image for the trusses)
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1. Please help me answer this mech. engineering question. Also please help me determine the force in CF and GF
Please help me with this one, thank you!! (for clarification the 2nd force is 1.5P)
Itranscript Required Information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. The truss shown consists of six members and is supported by a short link at A, two short links at B, and a ball-and-socket at D. Consider load of 420 lb applied at C. 10 ft Bol 24 t Determine the force in each of the members. The force in member AC (FAC) is The force in member BC (FBC) is The force in member CD (FCD) is The force in member AB (FAB) is The force in member BD (FBD) is The force in member AD (FAD) is Ib(Click to select) lb (Click to select) ✔ lb (Click to select) V lb (Click to select) b(Click to select) V lb (Click to select) V
1. Use the METHOD OF SECTIONS to determine the forces in members AC, BC, and BD of the truss in Figure 1 and indicate whether each of these members is in tension or compression. As usual, show any free-body diagram(s) (including all essential components), and clearly annotate all calculations. Note: You may use the support reactions calculated in Tutorial S2, Problem 3 without repeating the necessary calculations. A E 220° 1 m 25 KN B D 1 m 1 m Figure 1. [ans.: FAC = 51.29 kN (tension); FBC = -22.73 kN (comp); FBD = -16.07 kN (comp)]
Calculate the forces in all members of the trusses shown using the method of joints.
Problem 6. The truss below was designed to hang a one-of-a-kind sign that weighs 1000 lb. The sign is attached to the truss by two cables at attached at pin H of the truss and a rod that is attached at pin G of the truss; the rod is pin connected at both ends. The truss is attached to the wall by a pin at A and another cable (there are 3 cables at point H). Find the internal force in members AE, CH, EC, and EF. H cable cable 8' pin B с cable 8' 3' 3' rod E F 6' 1' 1.5' 2'> sign: 6'x 8', 1000 lb
FOR FULL CREDIT - DRAW A FREE-BODY DIAGRAM OF THE FRAME AND EACH MEMBER OF THE FRAME. When you write an equation indicate which body it is for. For example : "E F, = 0 for member ABC" or "E F = 0 for entire frame" Problem 1: Determine the resultant forces at pins B and C on member ABC of the four-member frame. + 2n- 150 lb/ft - 5 ft Note: B. Member FED is one solid piece. Member ABC is one solid piece. 4 ft BE and CD are two-force members. Ans. C = 350 Ib v B = 1,531 lb 53.1°
1) A Warren bridge truss is shown to the below. (a) Determine the support reactions at A and K. (b) Determine the force in members CE, DE, and DF using method of joints. (c) Determine the force in members CE, DE, and DF using method of sections. (Note: A is a roller and K is a pin.) Ans: Ay = 8400 lb (1), K, = 0, Ky = 3600 lb (T), FCE = 8000 lb (T), FDE = 2600 lb (T), FDF = 9000 lb (C). [Intermediate answers for method of joints: FAB = 9100 lb (C), FAC = 3500 lb (T), FBC = 9100 lb (T), FBD = 7000 lb (C), FcD = 2600 lb (C)I %3D 6.25 ft 12.5 ft, 12.5 ft 12.5 ft, 12.5 ft В F H 15 ft K E 12.5 ft 12.5 ft 12.5 ft' 12.5 ft' 12.5 ft 6000 lb 6000 lb
The given bridge truss supports point loads of 200kN at joints B, D, F, H, and J. The structure is supported by pin support at the joint A and roller support at the joint I. Determine the member forces AD, CE, CF, FH, GI, and IJ. Indicate whether the forces are compression or tension. Show your calculation steps in detail and write your answers in the box below. 200 kN 200 kN 200 kN 200 kN 200 kN D F В E 7 m 4 m 3 m -5 m -5 m 5 m -5 m