Why skating on ice leaves no trial behind?

Answer 1

There is a trail left behind; it is only as wide as the sharp end of the blade.

This trail can be seen quite easily if the ice is somewhat illuminated, or if viewed from an angle. For example, watch some Olympic or world championship skating on television (even ice hockey will do) and you can clearly indentify the many scratches in the ice surface,

Answer 2

when we will apply pressure the ice will melt and after we pass that area the melted ice will freeze back to form ice thus no trail is left

Answer 3

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