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Illustration of the experiment used to study the effects of impact and lace dynamics on a knot. The knot is mounted to a pendulum arm (approximately 20 cm in length) that is released from rest at a prescribed angle of inclination and impacts a surface. The angle was chosen to be approximately 43°. This choice of angle, combined with a tuning of the impact surface, produced an impact deceleration of ≈7g. (Online version in colour.)
