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A steel rod 2.0 m long has a cross-secti...

A steel rod 2.0 m long has a cross-sectional area of `0.30cm^(2)`. The rod is now hung by one end from a support structure, and a 550 kg milling machine is hung from the strain, and the elongation of the rod.

Text Solution

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`Stress=(F)/(A)=((550kg)(9.6 m//s^(2))/(3.0xx10^(-5)m^(2))`
`=1.8xx10^(8)Pa`
`Strain =(Deltal)/(l_0)=(stress)/(Y)=(1.8xx10^(8)Pa)/(20xx10^(10)Pa)`
`=9.0xx10^(-4)`
Elongation =`Deltal`
`=("strain")xxl_0`
`=(9.0xx10^(-4))(2.0m)`
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