## anonymous 3 years ago find axial stress

1. anonymous

2. anonymous

when you calculate for dM in 2nd step dM$\int\limits_{0}^{b}x^2 \sigma d x$ i cant figure out how x^2 pops out need help here ...

3. anonymous

apart from previous one I have another conceptual doubt |dw:1349027770783:dw| suppose this is a slender rod ,acted by tensile load P as previous and if I want to calculate axial stress at area b*b then whats is area should be taken whether its 4b^2 or b^2 ? I mean whole or the concerned area.....

4. anonymous

i get the solution you can remove now and thanks