Question

If the potential energy of a spring is V on stretching it by 2 cm, then its potential energy when it is stretched by 10 cm will be

• A. V/25
• B. 5V
• C. V/5
• D. 25V

Answer 1

The correct option is D

25V

$U=\frac{1}{2}\left(\frac{YA}{L}\right)l^2\therefore U\propto l^2$