A content analysis of Russian school physics textbook and task book has been conducted. All the formulas on mechanics have been identified and 9 topics have been defined, each corresponding to its own method of problem solving. The formulas have been encoded with a verbal code and are presented in a text file Formula.txt. The complexity of the concepts that denote physical quantities is as-sessed separately and their list is placed in the file Slovar.txt. With the help of the special computer program, the semantic complexity of the formulas is determined and the information folding coefficient is calculated for each formula. The differ-ence between definition formulas and those expressing functional dependencies has been taken into account. The distributions of formulas and methods in the space of their characteristics have been analyzed. The uncertainty and complexity of choosing formulas and solving tasks independently are estimated.