People, trucks and even military tanks have tried and failed the task of pulling apart two phone books lying face up with their pages interleaved, like a shuffled deck of cards. While physicists have long known that this must be due to enormous frictional forces, exactly how these forces are generated has been an enigma – until now.
A team of physicists from France and Canada has discovered that it is the layout of the books coupled with the act of pulling that is producing the force.
http://phys.org/news/2015-08-mystery-impossible-interleaved.html
(Score: 0) by Anonymous Coward on Friday August 28 2015, @04:05PM
They destroyed the books (binding ripped off), they did not successfully separate them.