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Language: en
Today I'm at the University of Sydney
talking to Rod Cross who's uh done
physics for many many decades.
Uh you are perfectly correct. I was a
student here in 1960.
Wow. So he certainly knows a lot about
physics. And today we're doing an
experiment involving a slinky. Can you
tell me about it?
Uh well I have here a slinky in my hand.
I'm going to hold the slinky by the top
end. Let the bottom end go so the slinky
stretches
and it dangles freely. And I'm going to
ask the question, what happens when I
let go at the top end? Will the bottom
end fall first? Will the top end fall
first?
Will both ends fall together? Or will
the center of the slinky stay at rest
and the top end and the bottom end
approach each other and they collapse in
the middle? Make your prediction and
then I'll drop it. Ready, set, go.
[laughter] Did you see it?