A 30-m steel tape weighing 1.75 kg is of standard length under a pull of 4.55 kg, supported for full length. This tape was used in measuring a line (found to be 1371.50 m) on smooth level ground under a steady pull of 8 kg. Assuming E = 2.05 x 10° kg/cm2 and that the unit weight of steel is 7.9 x 10 kg/cm?, determine the following: cross-sectional area of the tape correction for increase in tension for the whole tape length measured and the correct length of the measured line.

We have used an experimental setup similar to Example 10.1 to determine the value of a spring constant. The deflection caused by the corresponding weights are given in the accompanying table. What is the value of the spring constant? Weight (lb) The Deflection of the Spring (in.) 5.0 0.48 10.0 1.00 15.0 1.90 20.0 2.95

EB and FG are two planes inside a soil element ABCD as shown in Figure 10.50. Stress conditions on the two planes are Plane EB: EB = 25 kN/m2; EB = +10 kN/m2 Plane FG: FG = 10 kN/m2; FG = 5 kN/m2 (Note: Mohrs circle sign conventions for stresses are used above) Given ; = 25, determine: a. The maximum and minimum principal stresses b. The angle between the planes EB and FG c. The external stresses on planes AB and BC that would cause the above internal stresses on planes EB and FG