Re: Tidal bulges

[Dr P Barker <P.Barker@surrey.ac.uk>]

> Consider say The Girl in a Swing" (Richard Adams): if the girl is pushed at
> max displacement (the way it is usually done) at the resonant frequency the
> result is well known.
>
> But suppose she is given an aiding push on the way up instead of down or at
> the nadir.  Would it matter?  Indeed suppose she is pushed off resonant
> frequency.  Does that mean she can't swing at all?  Her frequency won't be
> at the resonant frequency, but she will swing.  
>
> Somebody give a better example. please.

Try sitting in the bath and sloshing around a bit!

If you ant to get adventurous try connecting two containers of different
sizes with a thin pipe and rock them at diffrent frequencies. (trouble
is you'll need big containers or a fast rocking).

Phil 
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