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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There are two kinds of courage: the courage that holds things together and the courage that throws them away. The first is more common it is the cement of civilization it is Lucy's. The second is the courage of drunks and suicides and mystics.
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