Ice skating is an act of gliding over the smooth surface of hard ice on ice skates – boots with attached metal blades. It is easy t skate on hard and smooth surface of ice because of the absence of frictional force between ice and the skating blade. Another reason is that ice melts under the pressure of the sharp blades of the skate and water thus formed acts as a lubricant which helps in skating. It is not possible to skate on snow or sand because the surface is not hard.