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-   -   Is there a scientific reason for what happens in this vedio (https://www.askmehelpdesk.com/showthread.php?t=641421)

  • Mar 6, 2012, 08:23 AM
    ahmedt92
    Is there a scientific reason for what happens in this vedio
    Is there a scientific reason for what happens in this vedio
  • Mar 6, 2012, 09:43 AM
    odinn7
    If you actually watched it, right in the video it tells you he has written the explanation for it. Just looking quickly. I was able to find the scientific reasons behind this... right there where he posted the video on Youtube.

    "Luckily, physics comes to the rescue, since there's a so-called "conservation law of angular momentum". The cork/string part will act as a pendulum, but the cork will gain speed as the string is pulled by the cup (smaller radius means greater velocity; it's the effect ice skaters use when performing a pirouette). The cork is then flung around the PVC tube a couple of times. The string creates friction on the tube, thereby slowing down the cup as it almost hits the ground."

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