The inclined plane is a slanted surface or ramp that helps us move objects up to another height. A modified inclined plane forms two of the other simple machines. A wedge and a screw are two simple machines that are types of inclined planes. A wedge is formed by two inclined planes placed back to back. A screw is formed when an inclined plane is wrapped around a cylinder. The inclined plane works best when used to roll an object up to a greater height. When you roll an object that is extremely heavy up an inclined plane gravity is pulling the object down. An incline plane increases the size of the effort force making work much easier.