Question

If a spring of spring constant $k$ extends by $x$ on loading due to an applied force $F$, then the energy stored by the spring is

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

We have $F=kx$ and $U=\frac{k{x}^2}{2}$.

Therefore,

$U=\frac{F^2}{2k}$