A uniform rod of mass m,length L,area of cross-section A and Young's modulus Y hangs from the ceiling.Its elongation under its own weight will be ------

Options :
  1. zero
  2. 2mgL/AY
  3. mgL/2AY
  4. none of the above
Answer and Explanation :-

Answer: Option 3

Explanation:

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Of course, we all inevitably work too hard, then we get burned out and have to spend the whole weekend in our pajamas, eating cereal straight out of the box and staring at the TV in a mild coma (which is the opposite of working, yes, but not exactly the same thing as pleasure).
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