40 &N Fig.4
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- PROBLEMS 2-7.2. In Fig. P-2-7.2, a boom AC is supported by a ball-and-socket joint at C and by the cables BE and AD. If the force multiplier of a force F acting from B to E is F A to D is P = 10 lb/ft and that of a force P acting from = 20 lb/ft, find the component of each force along AC. %3D %3D FAC -37.5 lb; PAC =D100 lb Ans. %3D %3D problem ble indA load weighing P kN aswith AB, AC and AD cables such asare carried. Points A and B are x-axis, Cand D points are on the y-z plane.Specific to your name in the data tableAB, AC and AD cable using ratingsCalculate the forces. P (kn) = 440 L1 (m) = 11 L2 (m) = 10 L3 (m) = 16 L4 (m) = 18 L5 (m) = 16 L6 (m) = 5The structure ABCD (shown below) is designed to support a finite mass hanging from a cable, DF, attached to the structure at point D. x=8m, y=6 m, and z-15 m. The structure is mounted to the ground by a hinge at B and a roller at C and is also supported by a horizontal cable, AE, attached to the wall. The mass of the object hanging from cable DF is 500 kg. The tension in the support cable AE is 1.000 × 10³ N. Determine the force in each member and the reaction forces. E D
- (1) W = 60 16 3 ft plez - 1 ft cordy 2 ft C крые AB= CD= 6 ft Xx 1.5 ft A block of weight W = 6016 is suspended from an arrangement of two poles (connected at A) and a cord (also connecting at A), as shown. Find the (mag of the tension in cord AC. Hint: The fules can treated like cords but their "tensions". be. will end. up being negative (i.e., compressive).A square body of side L-1 with one vertex on origin is in static equilibrium. It is subjected to body force per -axi - ayj, a unit area as , a = 1. The sides AB and BC are traction free whereas traction is uniform on the sides AB and AD with magnitudes qAB and qAD, with direction as shown. What are the values of qAB= and and QAD ? What are the values of ox= Oxy problem] 9AD D == Traction free с qAB Traction free B at point with coordinates x = y = [Assume no shear forces for thisThe vertical structure ABCD shown in Figure 1(a) is subjected to a (a) system of coplanar forces and a moment. The structure is simply supported at D with a frictionless pin and is roller-supported at A. 1. i. Sketch the free body diagram (FBD). Take moments about D and hence find the reaction force at support A. ii. 35 kNA 25m 05m 80 kN+ 60 100 KNm 75 KN 2m 05 m D 45 Figure 1(a)
- Calculate the rection forces when the radius of the pulleys are 0,1 m and K = 1200 N.A load weighing P kN as with AB, AC and AD cables such as are carried. Points A and B are x-axis, C and D points are on the y-z plane. Specific to your name in the data table AB, AC and AD cable using ratings Calculate the forces. P (kn) = 440 L1 (m) = 11 L2 (m) = 10 L3 (m) = 16 %3D %3D %3D L4 (m) = 18 L5 (m) = 16 L6 (m) = 5 %3D %3D %3D(78 E A O o 1.:ra Your answer Q1 * Find tension in AC and W ? 60 3° 10 lbs W=20 Ibs , TAC=17.32 Ibs W=18.95 Ibs , TAC=21.91 Ibs W=18 Ibs , TAC=20.1 lbs Find the reaction in pin A?
- Problem 3.24 - Enhanced with Hints and Feedback Consider the truss shown in (Figure 1). Suppose that F3 kN. Assume all members are pin connected. Figure tu G B C 4 m < 1 of 1 D 2m 2m-2m-2m- E Part C Determine the force in member GF of the truss and state if the member is in tension or compression. Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of compression and positive value in the case of tension. ► View Available Hint(s) FGF = Value Submit Part D μA OL HÅ Units Determine the force in member HC of the truss and state if the member is in tension or compression. Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of compression and positive value in the case of tension. ► View Available Hint(s) FRC = Value 6 of 7 KN Review ?mb: L d- ms A horizontal L=1.2 m long mb=12 kg uniform bar is hinged on the left end and pulled at the right end by a cable. The cable makes 31° angle with horizontal. A 18 kg store sign is suspended below the bar at d=0.18 m from the right end. Find the magnitude of vertical hinge force.Answer FOUR questions ONLY selecting TWO questions from SECTION A. 1. (a) The vertical structure ABCD shown in Figure 1(a) is subjected to a system of coplanar forces and a moment. The structure is simply supported at D with a frictionless pin and is roller-supported at A. i Sketch the free body diagram (FBD). Take moments about D and hence find the reaction force at support A. ii. 35 AN 23m 60 100 km Osm Figure 1(a) (b) An assembly of a steel bar enclosed within an aluminium alloy tube is shown in Figure 1(b). The tube and the bar are of the same initial length. The combination is compressed between two rigid parallel plates by a force of 500 kN. The diameter of the steel bar is 40 mm, and the inside and outside diameters of the alloy tube are 60 mm and 100 mm respectively. The Young's moduli for steel and aluminium alloy respectively are Est = 200 GNM2, EA = 70 GNm?. Find the stresses generated in the steel bar and the aluminium alloy tube. Sael he -Rid pl Figure 1(b)