Minecraft wiki entry for Minecart_with_Chest, associated text: Minecarts with chests are also able to interact with hoppers. Hoppers can take items out from the minecart chest if they are below the track as the minecart rolls over it or put them in if the minecart rolls under a downward facing hopper. Hoppers can also input items if they are facing into the side of the minecart.