An unknown weight falls through a height of 10mm on a collar rigidly attached to

Question

An unknown weight falls through a height of 10mm on a collar rigidly attached to a lower end of a vertical bar 500cm long. If E =200GPa what will be the value of stress?

Options:

A . 50 N/mm²

B . 60 N/mm²

C . 70 N/mm²

D . 80 N/mm²

Answer: Option D
Answer: (d).80 N/mm²

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