Why the skiers use flat and long skies to slide over snow?

Skiers use flat and long skis to distribute their weight evenly over the snow, reducing the pressure on any single point and preventing them from sinking too deeply. The length of the skis provides better stability and glide, allowing for smoother navigation over varying terrain. Additionally, the flat design minimizes resistance and enhances control, making it easier for skiers to maintain balance and speed while sliding.