The maximum instantaneous extension, produced by an unknown falling weight in a

Question

The maximum instantaneous extension, produced by an unknown falling weight in a vertical bar of length 3m. What will be the instantaneous stress induced in the vertical bar and the value of unknown weight if E = 200GPa?

Options:

A . 100 N/mm²

B . 110 N/mm²

C . 120 N/mm²

D . 140 N/mm²

Answer: Option D
Answer: (d).140 N/mm²

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