6.42 A floor truss is loaded as shown. Determine the force in me bers CF, EF, and EG. 250 lb 500 lb 500 lb 375 lb 250 lb 250 lb 125 |b 4 ft 4 ft 4 ft 4 ft 4 ft 4 ft E G 2 ft Fig. P6.42 and P6.43

(3) Using the method of sections, determine the force in member CG and state whether it is in tension or compression. 1.5 m, 1.5 m, 1.5 m. 1.5 m, 1.5 m, 1.5 m 2 kN 2 kN 12 kN 2 kN 1 kN 2 kN 1 kN F. H. 2 m Fig. P6.10

Problem 6.97 A woman having a weight of 175 lb attempts to hold herself using one of the two methods shown in (Figure 1). The platform has a weight of 50 lb. Figure C (a) B C (b) 1 of 1 > ▾ Part A Determine the total force the woman must exert on bar AB in case a. and case b. Express your answer in pounds to three significant figures. IVD ΑΣΦΠvec 4 (FAB) (FAB)b Submit Part B (Nc)a (Nc)b = Submit Determine the normal reaction the woman exerts on the platform at C in case a. and case b. Express your answer in pounds to three significant figures. ▾ Part C Request Answer Submit ▾ Part D ΠΙΑΣΦ [VA£¢|||1 vec 3 Determine the total force the woman must exert on bar AB in Express your answer in pounds to three significant figures. Request Answer ? Request Answer ? lb lb Determine the normal reaction the woman exerts on the platform at C in case b. Express your answer in pounds to three significant figures. lb lb ΠΙΑΣΦΩΤ VD ΑΣΦΩΤ vec vec I 3

6.43 Determine the force in members BD and DE of the truss shown. Answer 6.44 Determine the force in members DG and EG of the truss shown. Answer Fig. P6.43 and P6.44 2.4 m 2.4 m 2.4 m 135 KN 135 kN 135 kN A B D F 4.5 m с E G

PROBLEM 1: The 1500-kg beam ABC has fixed support at A and connected to beam BD by hinge at B. Beam BD has a mass of 2000 kg and supported by a cable at D. The cable is attached to the 20-cm-diameter pulley at E and pulled vertically at the other end, by tension T. Given: a = 1.5 m; b = 0.9 m; c = 1.8 m d = 0.6 m; e = 1.4 m; θ = 75°. Calculate the required tension to maintain in equilibrium. (ANSWER: 12.830KN) Calculate the moment reaction at A. (ANSWER: 28.499) Calculate the total reaction at A. (ANSWER: 22.192) Calculate the vertical reaction at E. (ANSWER: 25.223)

In the structure shown, force F is applied at point A at an angle of e in the direction shown. Pins at G, E, D, B, and C are all frictionless and all members are weightless. For the given values of F and e determine: F= 100 N 0 = 10 deg A G (a) The reactions at points G and E (b) The forces applied to member GDC at points C and D (c) The forces applied to member ABC at point B 70 m 50 m E D B Note: components of forces in x and y directions are enough. 15 m YA 60 m 20m

1.2 The 12-m long structural boom OA supports a load of 10 kN with the assistance of a cable AB. The boom weighs 3 kN itself. Determine the reactions at the pin support O and the tension in the cable AB. 10 KN A Weight of boom 6 m 60° 6 m 10 Fig. 1.2 30⁰ B

6.12 Determine the force in each member of the Howe roof truss shown. State whether each member is in tension (7) or compression (C). Answer FAB = FFH = Fig. P6.12 1500lbC;FAC = FCE = FEG = FGH = 1200lbT;FBc = Ffg = 0; Fbd = FCF = 1000lbC;Fbe = FeF = 500lbCFDE = 600lbT 300 lb A o 000 600 lb B C C O 600 lb D E 600 lb G O 300 lb 6 ft 8 ft· 8 ft 8 ft 8 ft →8 ft- H 4) 6 ft

Using the method of joints, determine the force in each member of the truss shown. State whether each member is in tension or compression.