Question

use the passage to answer the question. drag each sentence into the correct order to accurately summarize the text. (2 points) \science: why shoelace knot failure\ by nsikan akpan no matter how tight you tug, it feels like some shoelaces are doomed to come untied. fret no longer, as new research from the university of california, berkeley, has figured out the physics behind why the knots fail and why some shoelaces are more prone to the mistake. while the poetic inevitability of the slipup may provide comfort to those afflicted by wayward shoelaces, the research published tuesday in the proceedings of the royal society of london a may also provide clues for building soft, lifelike robots. mechanical engineer oliver o’reilly began looking into this telltale problem three years ago, after trying to teach his young daughter to tie her shoes. two graduate students began to study the effects of motion on shoelace knots. a researcher wondered about the science behind shoelaces coming untied. it is a combination of the two main movements used in walking that leads to shoelace knot failure. research showed that a single kind of motion did not cause shoelaces to come untied.

Explanation:

First, a researcher's curiosity about shoelace - knot science is introduced. Then, the start of the study by graduate students. After that, the finding that a single motion doesn't cause untying and the discovery that a combination of walking - motions leads to knot failure.

Answer:

1. A researcher wondered about the science behind shoelaces coming untied.
2. Two graduate students began to study the effects of motion on shoelace knots.
3. Research showed that a single kind of motion did not cause shoelaces to come untied.
4. It is a combination of the two main movements used in walking that leads to shoelace knot failure.