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A pickup truck tailgate supports a crate (WC = 150 lb), as shown in the figure

Mechanical Engineering

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A pickup truck tailgate supports a crate (W_C = 150 lb), as shown in the figure. The tailgate weighs W_T = 60 lb and is supported by two cables (only one is shown in the figure). Each cable has an effective cross-sectional area A_e  = 0.017 in².

(a) Find the tensile force T and normal stress # in each cable

(b) If each cable elongates δ = 0.01 in. due to the weight of both the crate and the tailgate, what is the average strain in the cable?