Two identical springs labeled as 1 and 2 are arranged in series and subjected to force F as shown in the given figure.
Assume that each spring constant is K. The strain energy stored in spring 1 is
1
\(F^2\over 2K\)
2
\(F^2\over 4K\)
3
\(F^2\over 8K\)
4
\(F^2\over 16K\)