I first saw these videos in the early 1970s during some of my physics classes at the University of Swansea. I think I was being taught about simple harmonic motion. But, everybody in my class agreed that my example, i.e., it is the motion of an unconstrained female breast when the subject is running, was even better than watching this bridge collapse.
Just 77-years ago. We have come a LONG WAY!
I hope you have all seen this before — I mean the bridge collapsing, not females jogging.
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