  In the first part of the article, we will outline the paradoxical picture
that arises when attempting to calculate the recoil force of the water leakage
from a hole at the bottom of a water tank. We will present three different
options for the recoil force acting on the water tank as a result of this
leakage (in Chapters 1, 2 and 3). In the second part of the article, we will
present an experiment that resolves this question (in Chapter 4). Finally (in
Chapter 5), we will present a coherent picture of the description of the
leakage and the result recoil force.
