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Determine the elongation of the steel ba...

Determine the elongation of the steel bar `1m` long and `1.5 cm^(2)` cross-sectional area when subjected to a pull of `1.5xx10^(4) N.`
(Take ` Y=2.0xx10^(11 )N//m^(2))`.

Text Solution

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Young's modulus, `Y=(F//A)/(Deltal//l)`
`therefore` Elongation of the steel wire, `Deltal=(Fl)/(AY)`
`Deltal=((1.5xx10)^(-4)(1))/((1.5xx10^(-4))(2xx10^(11)))=0.5xx10^(-3)m`
or `Deltal=0.5 mm`
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