On May 16, 2009, at 6:39 PM, Harry Veeder wrote:
As we all know ice is slippery because of melting from pressure and friction. Right? Not really... Harry http://www.exploratorium.edu/hockey/ice2.html Slippery All the Time
The slippery at all temperatures notion doesn't agree with practical experience driving on ice. Here icy roads (or lake or river surfaces) are very slippery near freezing, and have a firm grip down near -40 degrees F. This is probably due to hoar frost adhering and acting like a mounted abrasive - making the ice surface similar to sand paper. The experiments were probably done on very flat ice surfaces.
Best regards, Horace Heffner http://www.mtaonline.net/~hheffner/
