QUESTION 12 Two rods of different materials, E1-75 GPa and E2-150 GPa, having the same cross-section area and the same length, are subjected to axial force, if the applied force on the rod (2) is the double the applied force on the rod (1). The elongation of the rod (1) is: Equal to rod 2 Greater than rod 2. Less than rod 2. Equal to the summation of the elongation of both rods. QUESTION 13 A bolted lap joint is used to connect a rectangular bar to a hanger bracket, as shown in figure below, If the allowable shear stress in the bolt is 80 MPa, and the diameter of the bolt shaink is 15 mm, what is the allowable tensile load (P) applied on the rectangular bar, in KN: 16 KN 14 kN 25 kN 30 kN