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Re: Hollow Earth

It IS true that it is often said that the ball would exhibit simple
harmonic motion, but it would not. A friend of mine got
this question on his oral exam & gave the true answer.
What is it?

Cheers,
Bill Larson
Geneva, Switzerland

----- Original Message -----
From: Rodney Dunning <dunnirb4@WFU.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: 2000 April 22 7:45 PM
Subject: Re: Hollow Earth


Jim Green wrote:

Did I hear/see evidence that "some" planets are hollow -- that someone
reported that a ship actually sailed north into a hole at the Earth's
North
Pole or the like??? Is there evidence that someone looked through the
N/S
holes of a planet????

No, but if there were a hole connecting the poles, and you dropped a ball
in
it, the ball would exhibit simple harmonic motion. There is class of
idealized
problems like this at the Halliday-Resnick level of college physics. Maybe
that's what you're thinking about?

--
Rodney Dunning
dunnirb4@wfu.edu
http://www.wfu.edu/users/dunnirb4