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从牛顿第二定律给力和质量下定义是指: 力的定义为F≡ma; 质量的定义为m≡(F/a)。 这样定义是不妥当的,原因如下。 1 概念定义是形成判断的前提和基础。以判断反过来给前提概念下定义,是颠倒了因果关系。 牛顿第二定律是关于力、质量和加速度三个概念关系的判断。在形成该定律之前,三个概念均应有明确的定义。牛顿在建立第二定律之前也是这样做的,虽然在他的叙述中今日看来有许多不清晰之处。
The definition of force and mass from Newton’s second law means: Force is defined as F≡ma; Quality is defined as m≡(F/a). This definition is not appropriate for the following reasons. 1 Conceptual definition is the premise and basis for forming judgments. The definition of the premise is defined in reverse by judgment, which is a reversal of cause and effect. Newton’s second law is the judgment of the relationship between force, quality and acceleration. Before the law is formed, the three concepts should be clearly defined. Newton also did so before establishing the second law, although in his narratives today there are many unclear things.