Richard, this would be a good physics problem, and deserves an answer which I will try to determine later. But to your question about this question in terms of a math lesson, I think one of Dan's admirers (in the comments) puts it best...
"Hey Dan, not sure what I can do with this information, but I love that you did it, and it will make a cool math lesson."
You have to admit, Josh nailed it. Dan points to a set of math bloopers and then turns and runs smack into the same pole. I feel your pain, it is heart wrenching to watch, but you have to see the irony in it.:)
> > To be fair, those aren't examples of anything, > except > > Dan Meyer's half-cocked ideas about whatever the > hell > > it is he's talking about at his site. > > Joshua, I guess your use of the expression > 'half-cocked' means you aren't a fan... :-) > > Anyhow, Mr. Meyer just posted this and I found it > fascinating. > > http://blog.mrmeyer.com/?p=9447 > > Any Math-Teach gurus have any thoughts about the math > in this? > > Richard