The unified thought in physics is one of most important principles, which should be emphasized in physics education and teaching. In this paper the particle momentum theorem, kinetic energy theorem and angular momentum theorem are derived from Newton second law respectively and vise verse, demonstrating their equivalency, which could help people comprehend the logicality and systematicness of Newton mechanics.

As a referee the author took part in the event of university physics course lecture competition in 2023 in East China region. The competition process consists of two parts, a 20 min lecture and a 8 min Q&A. In this article, the competitor performance in the competition, especially that in the Q&A part is commented, encouraging young teachers to pursue excellence in physics teaching and become a good teacher who understands the concepts and laws of physics deeply and thoroughly.