[Physics] Can anyone analyze this perpetual machine that a Norwegian built

perpetual-motion

Take a look at this video:

http://www.youtube.com/watch?v=tlx2PgESXhs

It shows a machine that a Norwegian artist built. It seemingly keeps going forever. They filmed it over 3 days and it kept going at the same time.

Can someone analyze the energy losses in this machine?

I'm seeing several losses at the moment:

  1. The ball is losing energy due to friction while going around the track.
  2. The pendulums are losing energy due to air friction.

What other sources of energy losses can you notice?

Best Answer

What a beautiful machine! It is obviously radiating away energy, because it is loud.

I actually have a similar machine at my house. It is also a high-Q mechanical resonator with a very narrow frequency acceptance; I have compared it to standard frequency references and I believe its stability is $\Delta f/f \approx 1\times 10^{-4}$. Here's a photo of it:

my clock

I've even opened up the door so that you can see there is nothing fishy, or hidden, or even complicated. You're welcome to come and film it for three days; just give me a call first so I can wind it up clean the house.

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