向物理專業学生講“功與能”一章,通常以福里斯和季莫列娃合著的普通物理學中§§24、25、26三節作爲主要參考材料。但是,這三節在系统上很不便於教學,在內容上又有一些不正確的地方,根據它們來教“功與能”,結果會使同學們在學習上發生困難。 Speak to Physics students in chapter “Work and Energeticness,” which is commonly referred to as §§ 24, 25, 26, section 3, of General Physics, co-written by Forres and Tymoselva. However, these three sections are not systematically very convenient for teaching. There are also some incorrect contents in terms of teaching “power and energy” on the basis of them. As a result, students find it hard to learn.