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IF the strain be 1% of 0.1, find the cha...

IF the strain be 1% of 0.1, find the change in length of a wire 5 m long. If the cross-section is 1 `mm^(2)` and load 19 kg.wt, what is the ratio of stress to strain ?

Text Solution

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`because`Straing `=("Change in length")/("Original length")`
`therefore` Change in length=Strain`xx`Original length`=((1)/(100)xx0.1xx5)m=5xx10^(-3)m=5mm`.
`therefore("Stress")/("Strain")=(9.8xx10^(7))/((1)/(100)xx0.1)N//m^(2)=(9.8xx10^(7))/((1)/(1000))=N//m^(2)=9.8xx10^(10)N//m^(2)`
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