Q.

An unknown weight falls through 1 cm on a collar rigidly attached to the lower end of a vertical bar 3 m long and 6 m2 in section. If the maximum instantaneous extension is 2 mm the value of stress would be

A. 1500 kg/cm2
B. 500 kg/cm2
C. 1000 kg/cm2
D. 1333 kg/cm2
E. 667 kg/cm2
Answer» D. 1333 kg/cm2
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