Determine the force in member BE of the loaded truss. Enter a positive number if in tension, negative if in compression. 11' B 14' 15° 15° F E 11' 15° 1.0 L 1.7L 15° 45° A Answer: BE = i !L 45° D
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- Why does a sailboat need a keel?Two thin rods, one made of steel and the other of aluminium, are joined end to end. Each rod is 2.0m long and has cross-sectional area 9.1mm2 . If a 10,000N tensile force is applied at each end of the combination, find: (a) stress in each rod; (b) strain in each rod; and, (c) elongation of each rod.The signboard truss is designed to support a horizontal wind load of 770 lb. If the resultant of this load passes through point C, calculate the forces in members BG and BF. The forces are positive if in tension, negative if in compression. 770 lb- Answers: BG- BF- i i B 8' G -4' 6' 6 F in 6' lb lb
- The homogeneous wire ABCD is bent as shown and is attache to a hinge at C. Determine the length L that results in portic BCD of the wire being horizontal. - 200 mm -L- В D 150 mmA steel bar is 10 mm in diameter and 2 m long. It is stretched with a force of 20 kN. Calculate the stress carried. oa. 254.64 MPa ob. 174-23 kPa 174-23 MPa od. 254.64 kPaA thin rectangular plate is uniformly, deformed, as shown. Determine the shear strain y, at P. Assume a - 21 in, b- 29 in, c- 0.16 in, and d- 0.28 in. R Answer:Y prad.
- Calculate the forces in members AC, AD, and DE for the loaded truss. Restraining link BC is horizontal. Forces are positive if in tension, negative if in compression. B 6' 6' D 6' E 670 Ib Answer: AC = i Ib AD = Ib DE = Ib %3DThe rectangular piece of wood, 82 mm by 162 mm, is used as a compression block. The grain of the wood makes a 33.5° angle with the horizontal, as shown in the figure. Determine the largest axial force P (in N) that can be applied safely if the allowable stresses on the plane of the grain is 11.1 MPa for compression. Round off the final answer to three decimal places. 018 shear.pngAB = 5008.95 Ib AE = -4407.78 Ib BC = -2101.41 Ib BD = -7882.09 Ib BE = 2910 Ib CD = 4485.98 Ib DE = -4407.78 Ib
- The homogeneous wire ABCD is bent as shown and is attached to a hinge at C. Determine the length L that results in portion BCD of the wire being horizontal. 200 mm -L- В D IC 150 mm Ainoge The Fink truss is supported by a hinge at A and by rollers on a 1 to 2 slope at B. The bracing bars are normal to the inclined members at their midpoints. The wind loads are perpendicular to AC. Determine the resultant of the forces. 1580 Ib 3160 Ib 1580 Ib 12' В 8400 Ib 18.000 lb 72'Calculate the force in member BG using a freebody diagram of the rigid member ABC. The force is positive if in tension, negative if in compression. E 11¹ F 11' G KEA 15' 11' 11' B Answer: BG= i lb 530 lb