これまで耳にしてきた一般的な説は、氷の表面に圧力がかかると氷が溶け、その結果、できた水の膜によって滑りやすくなる、というものである。異なる説では、圧力ではなく摩擦によるものだと考え、物体が氷の上を動くと摩擦で熱が生じ水の膜ができる、とされてきた。

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