# Re: Fwd: The Concrete Wheel

Judy Ann Brown (judyann@dimacs.rutgers.edu)
Wed, 30 Apr 1997 17:05:41 -0400

100 MILES in diameter???
Would you see anything but concrete?
Why would you be sitting there watching this?
That is a 50 mile radius...rolling down the street...how wide is this wheel.

My brian can't comprehend this size. and the window is only 20 feet on a
side..that's a ratio of 264 to 1.

I think you would see an arc, that would be the leading edge of the concret
wheel. Then a long time later you would see another arc as the wheel rolled on
by.

Judy

Responding to the message of <970430112114_-964520842@emout01.mail.aol.com>
from IraFrdmn@aol.com:
>
> I think that I know the answer but I will check and wait until others have
> time to think about it.
> ---------------------
> Forwarded message:
> To: RFORMAN639@AOL.COM (Ron Forman)
> CC: irafrdmn@AOL.COM (Ira Friedman), ejf2@acpub.duke.edu (Eric Forman),
> fsawin@hypercon.com (Fred Sawin), thompson@utaphy.ph.utexas.edu (J.C.
> Thompson), btimmer@isi.edu (Brenda Timmerman), jan@extant.com (Jan Smith),
> jackarn@juno.com (Jack Arnow), F.Pleiter@phys.rug.nl (Frits Pleiter)
> Date: 97-04-30 05:10:33 EDT
>
>
> THE CONCRETE WHEEL
> [This problem is proposed by Victor J. Katz in a book review in
> the College Mathematics Journal, May 1997.]
>
> Suppose you are sitting in a ground level room, facing a square
> floor-to-ceiling window that is 20 feet on a side. A huge solid con-
> crete wheel, 100 miles in diameter, is rolling down the steet and is
> about to pass right in front of the window, from left to right. The
> center of the wheel is moving to the right at 100 miles per hour. What
> is the view, from inside the room, as the wheel passes by?
>
>
> .

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Judy Ann Brown
Pleasant Valley Middle School