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straight A space wire space is space suspended space by space one space end. space At space the space other space end space straight a space weight space equivalent space to space 20 space straight N space force space is space applied. space
If space the space increase space in space length space is space 1.0 space mm comma space the space increase space in space energy space of space the space wire space will space be

  1. 0.01 space straight J
  2. 0.02 space straight J
  3. 0.04 space straight J
  4. 1.00 space straight J

The correct answer is: 0.01 space straight J


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