Question: What is your favourite sport and the physics behind it if there is any?

Brian Weaver answered on 14 Mar 2019:

My favorite sport to play is football.
My favorite sport to watch is ice hockey! I played a lot of street hockey when I was younger.
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To me the coolest physics is in ice hockey/skating. It was accepted that the thin blade of an ice skate created enough pressure to change the state from ice to water. The thin layer of water is what you glide on and why ice is so slippery. At least that’s what I was taught in physics!
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More recent experiments challenege that idea and conclude that ice slipperiness depends on the ice temperature. The slip is caused by water molecules which exist interconnected with the ice molecules at the surface.
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It’s fascinating that something as “simple” as ice slipperiness is still being investigated, even today!