Grades 3-4 Video Solutions 2025-2025_3-4

Video Transcription

First, let's start off looking at option A. We look closely, we notice that because the bottom loop is in front of the top strand,  if we pulled on this rope at both ends, they would untwist completely. The same thing is true for B.  Both are pulled, since the loops are on top of each other and not through each other, they will simply unfurl and turn into a straight rope.  Next, if we look at C, if we twist the loop clockwise, we'll see that it is completely unfurled, making a straight rope.  And then for rope D, we see that the bottom loop is completely behind the top strand. So again, this will separate.  This leaves option E, which we can see, when pulled, it will create a knot.

Video Summary

The video explores different rope configurations and how they respond when pulled from both ends. Options A, B, C, and D all result in the ropes untwisting and forming a straight line because their loops are not intertwined. Option E, however, is distinct as pulling it will result in a knot forming, due to the intertwining of the loop. The analysis highlights the factors that determine whether a rope will form a knot or straighten out when tension is applied.

Keywords

rope configurations

untwisting

knot formation

tension

intertwining