A bar of solid circular cross section is loaded in tension by forces P (see figure). The bar has length L = 16.0 in. and diameter d = 0.50 in. The material is a magnesium alloy having modulus of elasticity E = 6.4 × 106 psi. The allowable stress in tension is σallow = 17,000 psi, and the elongation of the bar must not exceed 0.04 in.
What is the allowable value of the forces P?

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