In this paper is presented a pilot study for the investigation of the relevant factors within some experimental works carried out by students, after going through the learning unit "Movement and rest", which can be found in the chapter "Principles and laws in classical mechanics", from the physics curriculum for the ninth grade in Romania. Through the proposed work tasks, the design and the development of the experimental works carried out by students were highlighted. At the same time, special attention was paid to the results obtained by the students in investigating the relevant factors through specific physics methods, not only during the classes but also within the homework.