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One end of a steel wire of area of cross...

One end of a steel wire of area of cross section `3mm^2` is attached to the ceiling of an elevator moving up with an acceleration of `2.2m/s^2` . What is the stress developed in the wire if a load of 8kg is attached at it's free end.

Text Solution

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Tension in the wire (T)
`= m (g+a) = 8 [9.8 + 2.2] = 96 N `
`therefore stress = F//A = T//A = (96N)/(3 xx 10^(-6) m^2) = 32 xx 10^6 N/m^2`
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