What two simple machines are used for a conveyor belt used to load or unload a truck?

A conveyor belt used to load or unload a truck primarily utilizes the pulley and the inclined plane as simple machines. The pulley system helps to change the direction of the force applied to move the belt, while the inclined plane allows for the smooth transfer of materials onto and off the truck, reducing the effort needed to lift heavy loads. Together, these machines enhance efficiency in the loading and unloading process.