Physics-
General
Easy

Question

An elastic string of unstretched length  and force constant  is stretched by a small length . It is further stretched by another small length . The work done in the second stretching is

  1. 1 half ky squared
  2. 1 half straight k open parentheses straight x squared plus straight y squared close parentheses
  3. 1 half straight k left parenthesis straight x plus straight y right parenthesis squared
  4. 1 half ky left parenthesis 2 straight x plus straight y right parenthesis

The correct answer is: 1 half ky left parenthesis 2 straight x plus straight y right parenthesis


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