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Express breaking stress in terms of dens...

Express breaking stress in terms of density, maximum length of the wire and acceleration due to gravity.

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Breaking stress `=(mg)/A`
where `m= rho V` and `V=AL=` volume of the wire and `rho` is the volume density of material of the wire
Hence braking stress `=rholg`
At maximum length, the wrie breaks down due to its own weight.
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