2.3-3 A steel bar AD (see figure) has a cross-sectionalarea of 0.40 in.? and is loaded by forces P1 = 2700 lb, P2 =1800 lb, and P3 = 1300 lb. The lengths of the segments ofthe bar are a = 60 in., b = 24 in., and c = 36 in.(a) Assuming that the modulus of elasticity E30 x 10° psi, calculate the change in length ô of the bar.Does the bar elongate or shorten?(b) By what amount P should the load P3 be increasedso that the bar does not change in length when the threeloads are applied?PA P2IABy-aof

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2.3-3 A steel bar AD (see figure) has a cross-sectional area of 0.40 in.² and is loaded by forces P, = 2700 lb, P2 = 1800 lb, and P3 = 1300 lb. The lengths of the segments of the bar are a = 60 in., b = 24 in., and c = 36 in. (a) Assuming that the modulus of elasticity E 30 x 10° psi, calcuklate the change in length 8 of the bar. Does the bar elongate or shorten? (b) By what amount P should the load P3 be increased so that the bar does not change in length when the three loads are applied? P

2.3-3 A steel bar AD (see figure) has a cross-sectional area of 0.40 in.² and is loaded by forces P, = 2700 lb, P2 = 1800 lb, and P3 = 1300 lb. The lengths of the segments of the bar are a = 60 in., b = 24 in., and c = 36 in. (a) Assuming that the modulus of elasticity E 30 x 10° psi, calcuklate the change in length 8 of the bar. Does the bar elongate or shorten? (b) By what amount P should the load P3 be increased so that the bar does not change in length when the three loads are applied? P

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter2: Axially Loaded Members

Section: Chapter Questions

Problem 2.3.3P: An aluminum bar AD (see figure) has a cross-sectional area of 0.40 in- and is loaded by Forces Pi=...

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