View Full Version : What does this tell you about the universe, and what would Newton have said?

Loose rivets
17th Jun 2016, 10:22
Just another one of those simplistic demonstrations? Watch on.


17th Jun 2016, 10:32
Newton would have said. "Wow! That would make an excellent desk toy."

Seriously, I'd say mesmerizing, hypnotic, I want it for a screen saver.

17th Jun 2016, 11:11
I wonder how the person that constructed that would know there would be such a fascinating result, I want one, who sells the plans?:D

17th Jun 2016, 11:33
I suspect that he knew exactly what the result would be - if you look carefully you can see, when they are lined up with the board, that, side on, they form a slight curve compared to the top edge of the board, not a straight line. The individual lengths are carefully calculated so that the harmonics work out.

It is quite hypnotic, however, isn't it?


Arm out the window
17th Jun 2016, 11:39
Plans wouldn't be needed I reckon, just a frame with a bunch of weights hanging at progressively greater lengths so they form a line, suspended by two strings rather than one so they can't swing out of place and crash or tangle.

The patterns they form are beautiful to watch, but not surprising - just varying periods of swing for each progressively longer pendulum which give us that varying cycle of changes. The wonder of physics at work!

17th Jun 2016, 12:34
Eric Cox has created plans and digital models ...

Designing a Pendulum Wave and Unique Release Mechanism [portable document format (https://ericboy.files.wordpress.com/2012/10/pendulum_wave_math_tutorial.pdf)]

Pendulum Wave Bill of Materials [portable document format (https://ericboy.files.wordpress.com/2012/10/pendulum_wave_bom.pdf)]

Eric's digital model "Pendulum Wave Demonstration With Matlab" [site (https://ericboy.wordpress.com/2012/05/20/194/)][oPagRjbqbYA]

... a larger scale physical example "Pendulum Wave Demonstration"

17th Jun 2016, 17:41
I get the same sense of fascination watching the floaters in my eyes when I look up.

Best not to drive a car while your doing this

17th Jun 2016, 18:18
Newton would have said "'r'You A'right Duck?"

Mr Optimistic
18th Jun 2016, 17:48
'Get a proper job'