Q134 / 160 · AP EAMCET 2023 (18 May Shift 1) · Physics

The sag developed in a bar of length ' 1 ', breath 'b' and thickness ' $\mathrm{d}$ ' when subjected to a load of ' $w$ ' at center is (Y - Young's modulus of the material of the bar) Figure

  • A
    $\frac{w^2 l^2}{4 b d^2 Y}$
  • B
    $\frac{w^3}{b d^2 Y}$
  • C
    $\frac{w l^3}{4 b d^3 Y}$
  • Correct answer
    D
    None of the above

Solution

The sag developed in the bar when load is subjected at the centre of the bar is given by: $S=\frac{W l^3}{4 b d^3 \lambda}$

Hence, the correct answer is option: 'D'.

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