Prob. 1. A 600-lb tensile load is applied to a test coupon made from in. flat 16 steel plate (E= 29 x 10 psi, v=0.3). Determine the resulting change (a) in the 2-in gage length, (b) in the width of portion AB of the test coupon, (c) in the thickness of portion AB, (d) in the cross-sectional area of portion AB. 600 A 2 in. 600 lb Answer: (a) 1.324 x 103 in. (b) -99.3 x 10-6 in. (c) -12.41 x 10 in. (d) -12.41 x 10 in². Prob. 2. An aluminum plate (E= 74 GPa, v=0.33) is subjected to a centric axial load that causes a normal stress σ. Knowing that, before loading, a line of slope 2:1 is scribed on the plate, determine the slope of the line when σ = 125 MPa. Answer: 1.99551 Prob.3. A vibration isolation unit consists of two blocks of hard rubber bonded to plate AB and to rigid supports as shown. For the type and grade of rubber used Tall = 220 psi and G = 1800 psi. Knowing that a centric vertical force of magnitude P = 3.2 kips must cause a 0.1-in. vertical deflection of the plate AB, determine the smallest allowable dimensions a and b of the block. 3.0 in Answer: a=0.818 in. b= 2.42 in.