It is a flat surface that is higher on one end. You can use this machine to move an object to a lower or higher place.
Inclined planes make the work of moving things easier.
You would need less energy and force to move objects with an inclined plane. Stack the books in one pile. Lean one book against the other to create an inclined plane. Place the bag of rice on the table. While holding the end of the rubber band, lift the bag of rice straight up to the top of your book stack.