“探究加速度与力、质量的关系”是高中物理中的一个重要实验。人教版教材的实验装置中,为了将小车所受的拉力近似当成悬挂物(砝码和砝码盘)的重力,要求小车的质量M和悬挂物的质量m满足M>>_m的条件。教材没有对此作深入的细究,这是符合学生的认知水平的。但围绕该问题的改进或讨论却很多,笔者试再举一例加以分析,以供同行参考。 “Explore the relationship between acceleration and force, quality ” is an important experiment in high school physics. In the teaching device of the PEP, in order to approximate the pulling force of the car as the gravity of the suspended object (weight and weight plate), the mass M of the car and the mass m of the suspended object are required to satisfy the conditions of M >> _ m. The textbook does not make any further study about it, which is in line with the students’ cognitive level. However, there are many improvements or discussions around the issue. The author tries to give an example analysis for peer reference.