Question

A long spring is stretched by $2 cm$, it potential energy is U. If the spring is stretched by $10 cm$, the potential energy stored in it will be —

(a) $\frac{U}{25}$

(b) $\frac{U}{5}$

(c) $5 U$

(d) $25 U$

Answer 1

If the spring is stretched by $10 cm$, the potential energy stored in it will be 25U. So, The correct option of this question is (D).