1)An axial pull of 40000 N is acting on a bar consisting of three sections of length 30 cm, 25 cm, and 20 cm and of diameters of 2 cm, 4 cm, and 5 cm respectively. If Young's modulus = 2 x 10^5 N/mm², determine :
(i) stress in each section and
(ii) total extension of the bar.
SOLUTION:
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