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Find the greatest length of steel wire t...

Find the greatest length of steel wire that can hang vertically without breaking. Breaking stress of steel `=8.0xx10^(8) N//m^(2)`. Density of steel `=8.0xx10^(3) kg//m^(3)`. Take `g =10 m//s^(2)`.

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Greatest length of the wire without breaking.
L = Braking Stress / `rho g`
Here, breaking stress ` = 8 xx 10^8 Nm^(-2)`
` rho = 8 xx 10^3 kg m^(-3) , g = 10 ms^(-2)`
`L = (8 xx 10^8)/(8 xx 10^3 xx 10) = 1 xx 10^4 m = 10 km`
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