Shoelace knot

Shoelace knot

A shoelace knot gets untied while running due to the foot striking the ground at 7G. As the knot loosens, the swinging leg applies an inertial force on the free ends of the laces, which rapidly leads to a failure of the knot in as few as 2 strides after inertia acts on the laces.

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Categories: MiscScience

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