The friction force between the blade and the ice can heat up the ice and melt the ice to water. Therefore, the friction force between the blade and ice is much smaller than that between the shoe and the ice. |
注意物理概念:压力就能使冰溶解,不一定要摩擦力. |
冰刀与冰面的的接触面积小,压强大,造成冰融化产生一层薄薄的水膜从而大大减小了摩擦系数。 据说下雨天,地面还没有湿透时,容易出车祸也是类似的原因 |
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