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?

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? Correct Answer 80 N/mm2

Stress = E x strain = E x δL/L = 200,000 x 2 /5000 = 80 N/mm2.
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