Physics · GRAVITATION

Four identical particles, each of mass \( m \), are placed at the vertices of a square of side \( l \). The work required to double each side of the square while maintaining its square configuration is:

1. A
   \( 5.41 \frac{G m^2}{l} \)
2. B
   \( 2.705 \frac{G m^2}{l} \)
3. C
   \( 1.35 \frac{G m^2}{l} \)
4. D
   \( 10.82 \frac{G m^2}{l} \)