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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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