Final answer:
A planing hull is able to ride on top of the water once it has reached sufficient speed. This type of hull is commonly used in high-speed boats such as speedboats and racing boats.
Step-by-step explanation:
The type of hull that is able to ride on top of the water once it has reached sufficient speed is called a planing hull. Planing hulls are typically used in high-speed boats such as speedboats and racing boats. These hulls are designed in such a way that they create lift as they move through the water, allowing the boat to ride on top of the water surface.
One example of a planing hull is a flat-bottomed boat. The flat bottom creates a cushion of air between the hull and the water, reducing friction and allowing the boat to glide on top of the water's surface.
Another example is a boat with a V-shaped hull. The V-shape helps to cut through the water and creates lift, allowing the boat to rise up and ride on top of the water.