This paper establishes the transmission, teaching and apropiation of knowledge by the implementation of a “problem situation” based on experiments, in this case from the field of Fluid Mechanics. A “problem situation” allows the solution or the explanation of physics phenomena to be developed using knowledge of previous experiences and the fundamental concepts from within this particular area. A student without paradigms of solution, that is, without any previous ideas or experience of problema solving of specific problems, is able to propose ways to solve, from his own point of view and previous knowledge. In many cases, by his own intuition of the solution method, the student can introduce variables into the solution process that have been simplified, taken as irrelevant or unknown. Two particular cases were developed by third year students of Mechanical Engineering. The first one was to find the kinematic viscosity of an oil without measure it directly. The second one was carried out in order to show the buoyancy and stability of partially submerged bodies, in this case for a cheese ball under experimental conditions.