engineering recuitment PPSC JE Civil Mock Test 2022 Strength of Materials Simple Stress and Strain Deflection of Bar
The extension of a uniform tapering bar from D2 at the top to diameter D1at bottom and having a length l under an axial load P is given by:
1
\({{4\pi Pl} \over {E{D_1}{D_2}}}\)
2
\({{4\pi EPl} \over {{D_1}{D_2}}}\)
3
\({{4\pi {D_1}{D_2}} \over {EPL}}\)
4
\({{4PL} \over {\pi E{D_1}{D_2}}}\)