What will be the instantaneous stress produced in a bar 10cm² in area ans 4

Question

What will be the instantaneous stress produced in a bar 10cm² in area ans 4m long by the sudden application of tensile load of unknown magnitude, if the extension of the bar due to suddenly applied load is 1.35mm if E = 2×10⁵ N/mm²?

Options:

A . 67.5 N/mm²

B . 47 N/mm²

C . 55.4 N/mm²

D . 78.5 N/mm²

Answer: Option A
Answer: (a).67.5 N/mm²

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