You are given a large collection o
lnv(0c:g +nlc lx77hc0 nfyb-f identical heavy balls and lightweight rods. When two balls are placed at the ends of one rod and interact through their mutual gravitational attraction (as is shown on the left), the c
nx0c:lf vn7 lcn+0 (-gbl hyc7ompressive force in the rod is $F$. Next, three balls and three rods are placed at the vertexes and edges of an equilateral triangle (as is shown on the right). What is the compressive force in each rod in the latter case?