An aluminum bar (E 5 70 GPa, ? 5 0.33) of diameter 20 mm is stretched by axial forces P, causing its diameter to decrease by 0.022 mm. The load P is approximately:

(A) 73 kN

(B) 100 kN

(C) 140 kN

(D) 339 kN


(A) 73 kN

Physics & Space Science

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