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When a bar of length l and diameter d is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar). | |
A. | wl/2E [Wrong Answer] |
B. | wl2/2E [Correct Answer] |
C. | wl3/2E [Wrong Answer] |
D. | wl4/2E [Wrong Answer] |