I found this old book, origionally written in the 1920s in Russia, with the translated title "Physics for Entertainment." I have to say, this is one of the most interesting books I've ever picked up. It's full of fun brain teasers like this:
What's more slippery, smooth or bumpy ice? Why?
4 comments:
You are getting to be more fun to read all the time. ;-)
bumpy. I'm guessing because when it's really smooth there's a sort of suction with the melted water that makes it slippery. Besides, I always fall on my arse when the ice is bumpy.
Wow, and I thought smooth, because there isn't anything to stop the momentum or divert the glaze from temp changes.
Wishing I could edit my answer to add: "surface tension" instead of "kind of suction"...will maintain the fall on my arse part though.
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