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One end of a uniform wire of length l an...

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)`

Text Solution

Verified by Experts

The correct Answer is:
D
Stress `=(F)/(A)`
`F=(W)/(2)+(W)/(2)=W`
Stress `=(W)/(A)`.
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