# A vertical steel rod is fixed at the top and supports

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3.A vertical steel rod is fixed at the top and supports an 8-kN load at the lowerend. The rod is 10mm n diameter and 25 mm long. Unit weight of steel is 77kN/m3. What is the total elongation of the rod?A.12.732 mmB.12.853 mmC.12.973 mmD.12.612 mm
4.A hallow circular tube has an outside diameter of 85 mm and is 5 mm thick. Thetube is fixed (cantilever) at one end and subjected to a torque of 4 kN-m at itsfree end. What is the maximum shearing stress in the tube?
5.A decorative concrete beam is simply supported over a span of 6 m. The beamweighs 4 kN/m and the cracking moment is 38 kN-m. What is the safe uniformload of the beam?
6.A 2.8 m cantilever beam carries a uniformly distributed load of 20 kN/mthroughout its length and a concentrated load of 30 kN at a point 2 meters fromthe fixed end. What is the bending moment at the fixed end?
7.A 12 m long beam is simply supported at the left end and at 3 m from the rightend. The beam will be subjected to a uniformly distributed moving load. Whattotal length of the beam must be subjected to this load to produce maximumnegative moment at midspan?A.9 mB.3 mC.7.5 mD.4.5 m
Situation 1– The hook issubjected to three forces P, Qand S as shown. P = 35 kN and Q= 45 kN.8.Determine the anglesuch that the resultant ofthe three forces is 80 kNacting horizontally to theright.
1.If angle= 60°, find the magnitude of the force S such that the resultantforce is horizontal to the right.
2.Find the magnitude of the force S such that the three forces are in equilibrium.
Situation 2– Thehorizontal distance from Aat one end of the river toframe C at the other end is20 m. The cable carries aload of W = 50 kN. The sag“d” of the cable is 1 m.3.Find the distance x1such that the tension in segment AB of the cable is equalto that segment BC.A.9 mB.10 mC.12 mD.11 m

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