How can you classify iron and aluminum?
Iron cans stick well to the magnet. However, aluminum cans do not stick well to magnets.
If the conveyor belt's last wheel is a magnet, the iron cans are stuck to the magnets as long as possible.
On the other hand, aluminum cans do not stick well to magnets. Aluminum cans fall freely from the end of the conveyor belt.
What if you do this process with human hands?
This simulation tells us something significant. It means that you can work with high efficiency even if you do not put in a lot of labor. And when you want to automate a task, you may not need that complicated process.