engineering recuitment ONGC AEE Mechanical Mock Test 2025 Strength of Materials Simple Stress and Strain Deflection of Bar
The length of a conical bar is l, the diameter of the base is d and the weight per unit volume is w. It is fixed at its upper end and hangs freely. The elongation of the bar under the action of its own weight will be
1
wl2/2E
2
wl2/4E
3
wl2/6E
4
wl2/8E
5
wl2/12E