Question

One end of uniform wire of length `L` and of weight `W` is attached rigidly to a point in the roof and a weight `W_(1)` is suspended from its lower end. If `s` is the area of cross section of the wire, the stress in the wire at a height (`3L//4`) from its lower end is
A. `(W_(1))/s`
B. `[W_(1)+W/4]s`
C. `[W_(1)+(3W)/4]//s`
D. `(W_(1)+W)/s`

Answer 1

Correct Answer - C
Force`=`Weight suspended `+` weight of `3L//4` of wire
`=W_(1)+(3W)/4`
`"Stress"="Force"/"Area"`