The passage explains the complicated connection between how running works and how shoelace knots function. When someone runs, they can experience strong accelerations—up to 7 times the force of gravity—which put a lot of pressure on the shoelaces, creating extra inertia. This pressure makes the knots change shape over time because the loose end of the lace, affected by inertia, starts to slip out. Also, if weights are added to the ends of the laces, it further weakens the knot, showing that heavier materials make the problem worse. Therefore, not only do the forces from running put stress on shoelace knots, but how the laces are made and what materials are used also significantly affect how well the knots hold.
Put the paragraph below into simpler words without shortening it or changing the meaning.
The passage illustrates the intricate relationship between the physics of running and the mechanics of shoelace knots. As a person runs, the significant accelerations—reaching up to 7 g—exert substantial force on the shoelaces, leading to increased inertia. Consequently, this pressure causes the knots to deform over time as the free end of the lace, influenced by inertia, begins to slip out. Moreover, the addition of weights to the lace ends further deteriorates the knot's integrity, suggesting that heavier materials worsen the issue. Thus, not only does the biomechanics of running generate forces that challenge the stability of shoelace knots, but the design and material of the laces also play a crucial role in knot failure.
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