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wire with a radius of 5mm is hung freely from the ceiling. A load of 5N is applied to its free end. Find the elongation in the wire if its volume is 7.85*10^-5m³ & young’s modulus is 10¹¹N/m².
a) 6.21*10^-7m
b) 7.00*10^-7m
c) 6.36*10^-7m
d) 8.00*10^-9m

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