If you guessed motor oil , you're correct! You can see the effect of oil firsthand with a simple experiment in the kitchen. Rub your dry hands together as quickly as you can. Can you feel them heat up due to the force of friction? Now spray some cooking oil onto your hands and try again. Notice the difference? Shall we dance? Roller skaters have been enjoying the " Hokey Pokey " dance at roller rinks for years.
You don't need to dance on four wheels to enjoy the fun. Just follow the directions of the lyrics. You'll be rockin' and rollin' in no time. Did you get it? Test your knowledge. What are you wondering? Wonder Words inline traditional blade bearing friction resistance revolution alike fun foot square exercise corner difficult easily object balancing movement Take the Wonder Word Challenge.
Join the Discussion. I can relate to firefly. The first time I went skating, every 10 seconds I fell on my behind! Nov 14, HI Kitty Wonder, do u like roller skating.
Mar 24, Thanks for sharing your experience! We are so glad you enjoyed this Wonder! HiImBob Mar 1, That was interesting. I didn't think they'd have this! But one question, i can't find stuff about playgrounds, can you help me? Mar 2, George May 24, May 24, Hi, George! Kailee May 16, Even though I don't roller skate very often, it is fun.
I think of roller skates as shoes with wheels on the bottoms. Wonderopolis May 16, I can relate! FME Trans. Download references. News 11 NOV Article 10 NOV Research Highlight 05 NOV Article 22 SEP Research Highlight 20 AUG University of Washington UW. Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily. Advanced search. Skip to main content Thank you for visiting nature.
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Improve this question. Lagerbaer Lagerbaer 14k 3 3 gold badges 64 64 silver badges 80 80 bronze badges. There should be some friction between the skates and ice and this should provide enough heat to melt the ice and create a thin water film. At least this is my intuition perhaps completely wrong. Add a comment. Active Oldest Votes. Improve this answer. Compressing a surface of water-ice will melt some surface, but compressing the surface of other materials will solidify any surface liquid, because liquid ice has a smaller volume.
The explanation is fundamentally correct, the bulk melting is irrelevant. I would think at least some of the weight of the skater would be borne by liquid water unless the compressed water liquified, reshaped itself to a lower-pressure configuration, and refroze.
Would skis be effective at on a polished frozen sheet of ice? My point is that even if there wouldn't be enough pressure for ice to melt if weight were uniformly applied on a skate, some areas under a skate will usually be under much higher pressure than others.
Bert Barrois Bert Barrois 2, 5 5 silver badges 18 18 bronze badges. References Calderon, C. Reports on Progress in Physics,58, Gwyn Gwyn 7 7 bronze badges.
Great to see that there's still new material being published on these topics. Thank you for sharing the paper. It's been bugging scientists and engineers since the 19th century, don't know if this is the final word, but I haven't seen anything new on the topic over the last year or so. Georg Georg 6, 20 20 silver badges 34 34 bronze badges. Why would you expect skiing and skating to exploit the same mechanism? Why would you expect snow and solid ice to have the same properties? Johan Johan 11 1 1 bronze badge.
Fawad Fawad 4 4 silver badges 18 18 bronze badges. Unless you can prove otherwise I think it is unwise to cite that wikipedia entry as a source. It was also cited with a source in the misconceptions I don't currently have access to the source. Unless you can provide some good proof of this, you are going against the other things said and the purpose of this thread.
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