Figure shows the graph of elastic potential energy U stored versus extension, for a steel wire Y= 2× 1011 Pa of volume 200 cc. If area of cross section A and original

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Figure shows the graph of elastic potential energy U stored versus extension, for a steel wire Y= 2× 1011 Pa of volume 200 cc. If area of cross section A and original length L, then
Figure shows the graph of elastic potential energy U stored versus extension- for a steel wire Y- 2- 1011 Pa of volume 200 cc- If area of cross-section A and original length L- then
We can assume, elastic potential energy (U) equal to 12 kx^2 as curve is a parabola symmetric about Y-axis and open upward. So, U=12kx^2 (1)