Physics
Skating on ice is possible because

The pressure on the ice due to skate raises its melting point
Ice is cold
The surface of ice is smooth
The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water

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Physics
Kinetic energy depends on

Both mass and velocity of the moving body
The velocity or speed of the moving body.
The mass of the moving body
The pressure of the moving body

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