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Question

If a spring extends by x on loading, then energy stored by the spring is (Given: T is the tension in spring and k is spring constant)
  1. T24k
  2. 2T2k
  3. T22k
  4. T2k


Solution

The correct option is C T22k
Energy stored in spring E=12kx2
T=kxx=Tk

E=12k(Tk)2=12T2k

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