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Explain what is stress ? Write its unit and dimensional formula.

Answer» <html><body><p></p>Solution :When forces are applied on a body in such a manner that the body is still in static equilibrium it is deformed to a small or large extent. <br/> Deformation depending upon the nature of the material of the body and the magnitude of the deforming force. <br/> The deformation may not be <a href="https://interviewquestions.tuteehub.com/tag/noticeable-7699971" style="font-weight:bold;" target="_blank" title="Click to know more about NOTICEABLE">NOTICEABLE</a> <a href="https://interviewquestions.tuteehub.com/tag/visually-7257796" style="font-weight:bold;" target="_blank" title="Click to know more about VISUALLY">VISUALLY</a> in many materials but it is there when a body is subjected to a deforming force, a restoring force is developed in the body. <br/> This restoring force is equal in magnitude but <a href="https://interviewquestions.tuteehub.com/tag/opposite-1137237" style="font-weight:bold;" target="_blank" title="Click to know more about OPPOSITE">OPPOSITE</a> in the <a href="https://interviewquestions.tuteehub.com/tag/direction-1696" style="font-weight:bold;" target="_blank" title="Click to know more about DIRECTION">DIRECTION</a> to the applied force. <br/> The restoring force per <a href="https://interviewquestions.tuteehub.com/tag/unit-1438166" style="font-weight:bold;" target="_blank" title="Click to know more about UNIT">UNIT</a> area is known as stress. <br/> If F is the force applied and A is the area of cross section of the body,<br/>Magnitude of stress `=F/A` Its SI unit is `Nm^(-2)` or Pascal (Pa).<br/>Its dimensional formula is (`ML^(-1)T^(-2)`).</body></html>


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