Calculate the compressional force requir...

Calculate the compressional force required to prevent the metallic rod length `l cm` and cross-sectional area `A cm^(2)` when heated through `t^(@)C`, from expanding along length wise. The Young's modulus of elasticity of the metal is `E` and mean coefficient of linear expansion is `alpha` per degree Celsius

`E A alpha t`

`(EA alphat)/((1+alphat))`

`(EA alphat)/((1-alphat))`

`El alphat`

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