A wire of cross-section A is stretched horizontally between two clamps located $2 l$ meters apart. A weight W kg is suspended from the mid point of the wire. If the mid point sags vertically through a distance $x ≪ l$ the strain produced is

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TestHub · Accepted Answer

Each half changes from l to √(l²+x²). For x much smaller than l, strain is x²/(2l²).

Physics - Mechanical Properties of Solids Question with Solution | TestHub

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