Once inside a domestic coffee maker it is easy to realize that the physics of how it works is not at all complicated. First of all there is the little bucket that holds the water when you pour it into the pot at the start of the coffee making cycle. Then there is a black tube that carries the hot water to the drip area. Water reaches the drip area from the black hot water tube and simply falls through the holes into the coffee grounds . The force behind this system is gravity.
Gravity pulls the water down through the filter and the grounds and into the pot.
This is the ingenious of the drip system coffee maker. The coffee machine with the assistance of gravity produces a pot of coffee with no manual work. This was a major breakthrough in the evolution of the coffee maker. On the opposite end, the bottom of the coffee maker is another view at how the equipment functions in making your coffee. The depression on the right hand side of this figure is the bottom of the bucket.