A vertical hanging bar of length $l$ and mass $m$ per unit length carries a load of mass $M$ at lower end, its upper end is clamped to a rigid support. The tensile stress a distance $x$ from support is $(A \rightarrow$ area of cross-section of bar)
  • A$\frac{M g}{A}$
  • B$\frac{M g+m g(I-x)}{A}$
  • C$\frac{M g+m g l}{A}$
  • D$\frac{(M+m) g x}{A l}$
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