Question

use the passage from the science behind why your shoelace knot is doomed to fail by nsikan akpan to answer the question.
which connection is demonstrated by the passage?

\science: why
shoelace knot
failure\
by nsikan akpan

to break down the physics of the phenomenon, the
researchers attached a small device to the free end of
the laces that measured acceleration, and then gregg
went for a walk or a jog. the acceleration creates
inertia, which is the tendency for an object to keep
moving once it is in motion.

\we were surprised that the accelerations were so high
theyre like 7 g (units of acceleration),\ oreilly said.
\by way of comparison, the highest g on a roller coaster
any is 6.3. your foot is experiencing these really high g-
forces as youre running all the time. its a
biomechanical miracle that all of that impact is
absorbed through your body and spine.\

the knot itself is under pressure too. the video
showed as the shoelaces bounce up and down with
each footfall, the main knot began to deform. once the
knot deforms sufficiently, then the free end of the lace,
which is being tugged by inertia, begins to slip out.

(1 point)
○ the impact of inertia on the foot
○ the impact of inertia on knots
○ the impact of acceleration on shoes
○ the impact of acceleration on the spine

Explanation:

1. Analyze each option:

• Option 1: The passage focuses on shoelace knots, not the impact of inertia on the foot. The foot's acceleration and inertia are mentioned in relation to the knot, not the foot's impact.
• Option 2: The passage states that the acceleration creates inertia, and the knot deforms, then the free end slips due to inertia. It explains how inertia (from acceleration) affects the shoelace knot (a system with knots). The research shows the knot deforms under pressure from footfalls, and the free end slips because of inertia. So this option matches the connection between inertia and knots.
• Option 3: The passage does not discuss the impact of acceleration on shoes. It's about the knot, not the shoes themselves.
• Option 4: The passage mentions the impact on the body and spine in terms of the foot's acceleration, but the main connection of the passage (about the shoelace knot failure) is about inertia and the knot, not acceleration and the spine. The spine part is a side - note about the foot's impact, not the main connection of the passage.

Answer:

the impact of inertia on knots