One end of a uniform wire of length `l` and weight W is attached to a point in the roof and a weight W/2 is suspended from the lower end. If A is the area fo cross-section of the wire, then stress of the wire at its midpoint will be
A. `(W)/(2A)`
B. `(2W)/(A)`
C. `(3W)/(2A)`
D. `(W)/(A)`

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1 Answers

Correct Answer - D
Stress `=(F)/(A)`
`F=(W)/(2)+(W)/(2)=W`
Stress `=(W)/(A)`.

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