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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. |
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Answer» Solution :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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