<p>The frictional force between the body of a fast boat and the surface of water is reduced especially at high speeds by fixing wheels of special type at the sides of the boat. The wheels gradually contact the surface of the water at high speed. The wheels spin when they contact the water which allows the boat to be lifted up gradually until the whole weight of the boat is carried by these wheels. This allows the minimum frictional force between the boat and the water.</p>
