3. An aluminum rod is 250 mm long with a diameter of 25 mm before a 165-kN load is applied as shown below. The load causes an elongation of 1.2 mm. Determine: (a) The normal stress in the rod. (b) The normal strain in the rod. (c) The modulus of elasticity of the aluminum. 165 KN 165 KN K250 mm
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