Two massless rods are attached to frictionless pivots, with their ends touching. The distances between the pivot points and the endpoints of the rods are shown below.
Neglecting friction between the rods, if a force F is applied at the left end of the left rod, what force F^{\prime} must be applied at the right end of the right rod to keep the system in equilibrium?
Answer Choices
A. F / 8
B. F / 2 \leftarrow CORRECT
C. 4 F / 7
D. 6 F / 5
E. 2 F
