Q. If a spring extends by $x$ on loading, then the energy stored by the spring is (if $T$ is tension in the spring and $k$ is spring constant)
A) $\frac{T^{2}}{2x}$
B) $\frac{T^{2}}{2k}$
C) $\frac{2x}{T^{2}}$
D) $\frac{2T^{2}}{k}$
Explanation
(b) $U = \frac{F^{2}}{2K} = \frac{T^{2}}{2K}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.