“牛顿运动定律”是高中物理的主干知识,也是学习的难点之一,探究加速度跟合外力、质量的关系的实验更是几乎每年高考必考的知识点。围绕加速度和合外力的测量以及相互关系的处理,各种变化是层出不穷。现对一些常见的探究方法作一点评析,以便我们能更好地理解相关实验原理,进一步把握命题的趋势。首先还是来说一下实验的基本原理。要探究加速度跟合外力、质量的关系,就必须测出加速度、合外力和物体的质量。物体的质量可以利用天平准确地测出;加速度则大多数是 “Newton’s Law of Motion” is the main knowledge of high school physics, and it is also one of the difficulties in learning. Experiments that explore the relationship between acceleration and external forces and quality are the most important points for entrance exams every year. Around the measurement of acceleration and external forces and the processing of mutual relations, various changes have emerged one after another. Now we will review some common methods of inquiry so that we can better understand the relevant experimental principles and further grasp the propositional trends. First of all, let’s talk about the basic principles of the experiment. To investigate the relationship between acceleration and external forces and masses, it is necessary to measure the acceleration, external force and mass of the object. The mass of the object can be accurately measured using the balance; the acceleration is mostly