A simplified model of a basketball hoop is shown. During a basket dunk a player hangs from the rim applying a force of 320 lbs including a dynamic load factor. The stand is a square tube with 5 inches outside length and 0.25 inches thickness. The distance from the edge of the rim to the middle of the square tube is 4 ft. Assuming the model is rigid, the normal stress at point A is most closely equal to: A d F