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Physics · Mechanical Properties of Matter

NEET (UG) 2023 — Question 28

Let a wire be suspended from the ceiling (rigid support) and stretched by a weight WW attached at its free end. The longitudinal stress at any point of cross-sectional area AA of the wire is :

  1. Option A:

    W/AW / A

    Correct
  2. Option B:

    W/2AW / 2 A

  3. Option C:

    zerozero

  4. Option D:

    2W/A2 W / A

Answer: A

Step-by-step solution

 Longitudinal   stress = Internal   restoring   force  Area =Fext  Area  Stress =WA\begin{aligned} & \text { Longitudinal\; stress }=\frac{\text { Internal\; restoring\; force }}{\text { Area }}=\frac{F_{\text {ext }}}{\text { Area }} \\ & \text { Stress }=\frac{W}{A}\end{aligned}

Solution figure

Answer key and solution verified before publishing.

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Exam
NEET (UG) 2023
Paper
2023 paper
Subject
Physics
Chapter
Mechanical Properties of Matter
Topic
Longitudinal Strain and Elastic Potential Energy

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