Mathematics · Strength of Materials
When a bar of length l and diameter d is rigidly fixed at the upper end and hanging freely, the total elongation produced in the bar due to its own weight is (where w = weight per unit volume of the bar):
- 1wl42E
- 2wl32E
- 3wl22E✓
- 4wl2E
Correct answer
wl22E
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