Easy
If a spring extends by $x$ on loading,then the energy stored in the spring is (where $T$ is the tension in the spring and $K$ is the spring constant):
- A$\frac{T^2}{2x}$
- B$\frac{T^2}{2K}$
- C$\frac{2K}{T^2}$
- D$\frac{2T^2}{K}$
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