Dynamic kernmantle stretches how much?

• A. 20%
• B. 40%
• C. 60%
• D. 80%

Answer: (C)

Dynamic kernmantle rope is designed to stretch significantly when loaded to absorb energy from a fall. The elongation during a dynamic event can reach about sixty percent of the rope’s original length, depending on rope size and construction. This stretch spreads out the impact forces, protecting climbers and anchors. Static ropes stretch far less, which is why dynamic rope is used for fall-arrest scenarios. Always check the rope’s specifications, but sixty percent is a common expectation for many rescue dynamic ropes.