正负号在物理学中的应用

Positive and negative signs in physics application

正负号在物理学中的应用非常广泛,由于它所表达的含义很多,所以学生在学习过程中容易混淆,是个难点问题.根据物理学教材内容的要求,将常用的正负号的意义进行归纳总结,让学生根据所学内容逐步理解正负号的不同含义,并能正确运用它解决实际问题.

Positive and negative signs are widely used in physics. Students are often confused due to the extensive meanings that they stand for, which is a difficult point. According to the textbook content and requirements, the common meanings of positive and negative signs are analysed and summarized here, so that students can come to understand the various meanings of positive and negative signs and apply them to resolve practical questions.