You are given a large collection of identical heavy bal
u5,9or;uvv 4kmlx 4qsls 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 compressive force in the rod
lv;,9q ukm 4uxo 45svris $F$. 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?