Re: [Phys-L] Perpetual Motion Machine

[brian whatcott <betwys1@sbcglobal.net>]

Sadly, the turning moment of the left hand tubes
 equals the turning moment of the right hand tubes

Brian Whatcott

On 3/25/2015 6:42 AM, Peter Schoch wrote:
> So, we've gotten to the point in the semester where the students are
> finding things on the Internet they want me to explain -- in addition to
> covering the 'normal' material.
>
> One student found this:
>
> https://www.youtube.com/watch?v=7KqOwJKWIAw
>
> and wants me to explain how this is NOT a perpetual motion machine.
>
> I think I can explain the chain one fairly well.  I'm having trouble with
> the liquid motion one, explaining it in terms of freshman physics.
>
> Any suggestions would be welcome.
>
> Peter Schoch
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