Multiple choice

The symmetry of stress tensor at a point in the body under equilibrium is obtained from

  1. conservation of mass

  2. force equilibrium equations

  3. moment equilibrium equations

  4. conservation of energy
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C Correct answer
Explanation

 $\text{Symmetry of stress tensor means}\\ \hspace{3cm}\sigma_{ab}=\sigma_{ba}\\ \text{and this is only possible under moment equilibrium equations.}$

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