Ice skaters do not fall on the smooth ice floor. Why?
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The general low level of friction on ice allows a skater to glide along the surface smoothly without friction stopping the motion as soon as it's begun.
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Answer:
A skater can glide over ice because there is a layer of ice molecules on the surface that are not as tightly bound as the molecules of the mass of ice beneath. These molecules are in a semiliquid state, providing lubrication.
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