Why is Galileo Galilei called the founder of the new physics?

The features of a new stage in the development of physics, starting with the work of Galileo, were the search for quantitative regularities connecting physical quantities and the conduct of special experiments to establish the predicted regularities.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.