It’s a problem no one has dared to study before: why, exactly, do shoelaces come untied?
Three mechanical technologists at UC Berkeley — Christine Gregg, Oliver O’Reilly, and Christopher Daily-Diamond — have been busy figuring out the answer to one of life’s simplest( and most vexing) problems. According to their study, which was recently published in Proceedings of the Royal Society A, it all depends on two main factors: stomping and whipping forces-out .
In order to arrive at these findings, the Cal Berkeley technologists videotaped Gregg while she ran on a treadmill. It was filmed in slow-motion so researchers could figure out what causes” shoelace knot failing .”