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Physics
OpenStudy (vincent-lyon.fr):

What happens to the bottom-end of a Slinky if you hold it dangling by top-end and drop it? ABC in Australia made a programme out of it. You can watch it following the link below. Try to answer without watching the video to the point where it is revealed. http://www.youtube.com/watch?v=mAA613hqqZ0&feature=g-all-u

OpenStudy (jamesj):

Nice find, thanks! (And I love my ABC, the *real* ABC ;-) )

OpenStudy (experimentx):

thanks for sharing!!

OpenStudy (ujjwal):

Interesting physics.. Thanks @Vincent-Lyon.Fr for sharing it.

OpenStudy (vincent-lyon.fr):

All of Derek's videos are great. I recommend those on Earth/Moon, inertia and laws of motion. Search for "How far away is the Moon (the scale of the universe)" "Spinning tube trick" is also challenging.

OpenStudy (asnaseer):

Very nice find indeed - I love this type of stuff!

OpenStudy (anonymous):

Cool post! I had a hunch it wouldn't move, but even when I see the video it looks super counter-intuitive. Good food for thought.

OpenStudy (vincent-lyon.fr):

If I may use an anthropomorphism: the bottom coil doesn't 'know' that the top end has been let loose until the wave has told it by carrying the information down.

OpenStudy (anonymous):

Very interesting stuff, indeed. Thanks for sharing.

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