牛顿第二定律明确了加速度与力、质量之间的关系.在新课程标准下,对这三个物理量之间的关系掌握、理解和应用固然重要,但得出三者关系的过程以及这个过程中的科学方法也决不能忽视.一般来说,通过实验的方法探究多个物理量间的关系常用控制变量法.所谓控制变量法就是当研究多个 Newton’s second law defines the relationship between acceleration, force, and quality. Under the new curriculum standard, it is important to grasp, understand, and use the relationship among these three physical quantities, but the process of the three relationships and the process The scientific method in the middle must not be ignored. In general, the relationship between multiple physical quantities is explored through experimental methods. The control variable method is commonly used.