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A dynamic rope is a specially constructed, stretchable rope. This 'stretch' is what makes it 'dynamic', in contrast to a static rope that doesn't have any give when under load. By stretching under load, a dynamic rope will soften the impact of extreme stresses on it, such as falls, and lessens the likelihood of failure. This is particularly useful in rock climbing, where it can absorb much of the energy of a fall (referred to as a whipper amongst rock climbers).