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Young's modulus for a perfectly rigid bo...

Young's modulus for a perfectly rigid body is

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Young's modulus (Y) = `(F)/(A) xx (l)/(Deltal)`
For a perfectly rigid body, change in length `Delta l = 0`
`therefore" "Y = (F)/(A) xx (l)/(0) = oo`
Therefore, Young's modulus for a perfectly rigid body is infinite `(oo)`.
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