A uniform heavy rod of weight W, cross s...

A uniform heavy rod of weight W, cross sectional area a and length L is hanging from fixed support. Young modulus of the material of the rod is Y. Neglect the lateral contraction. Find the elongation of the rod.

`WL/YA`

`WL/2YA`

`WL/4YA`

`3WL/4YA`

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