How does every knot affect rope strength?

The correct answer highlights that every knot diminishes the strength of the rope. When a knot is tied in a rope, it creates specific stress points and reduces the effective working strength of the rope due to how it alters the rope's tension distribution. The tighter the knot is drawn, the more it can cause localized stresses that lead to potential weak points.

Additionally, every knot introduces a bend or twist in the rope, which can create friction and uneven loading, ultimately affecting the overall strength and integrity of the rope. For most knots, the drop in strength can vary depending on the type of knot and the construction of the rope. It is crucial for rescuers and climbers to understand this reduction in strength, as they must account for it when calculating the load limits and safety factors during a rescue operation or climbing scenario.