Re: [Phys-L] Perpetual Motion Machine

[Bill Norwood <bnorwood111@gmail.com>]

Still a worthwhile excercise in escorting the students through this PROOF
of "fakeness"  (if it is indeed fake) since so much stuff they will
encounter on YouTube and elsewhere will actually be fake.

On Wed, Mar 25, 2015 at 10:22 AM, John Denker <jsd@av8n.com> wrote:

> On 03/25/2015 07:08 AM, Bill Norwood wrote:
>
> > It might be a worthwhile demo to measure the on-screen slowing down of
> > these perpetual motion machines, which, by the way, are operated only for
> > short intervals in the video.
>
> The videos look fake to me.  I assume there is a hidden motor
> to overcome friction.
>
> Along the same lines:  If they were serious about presenting
> the actual physics, they would demonstrate running each machine
> in the "backwards" direction.
>
>
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