What defines Static rope?

Static rope is specifically characterized by having limited stretch under load, making it suitable for applications where minimal elongation is critical for safety and performance. The correct answer highlights that static ropes are designed to stretch a maximum of 6% at 10% of their tensile strength. This low stretch threshold helps maintain stability and control in situations such as rope rescue operations or repelling, where even slight elongation could pose a risk.

The other options describe characteristics that are either too flexible or do not align with the established definitions of static rope. For example, a rope with no stretch under load does not exist in practical terms as all materials have some degree of elasticity, even if it's minimal. Similarly, a rope that stretches more than 10% under load is typically classified as dynamic rather than static, as dynamic ropes are designed to absorb shock and thus can elongate significantly. The reference to a maximum stretch of 15% is also misleading for static rope, as it exceeds the established limits for that category. Overall, the definition of static rope is crucial for ensuring safety and effectiveness in various applications in rope rescue and climbing.