在高中物理教学中,有几个实验是用斜面小车进行的.其中“验证牛顿第二定律”等是定量实验,如果误差太大,就达不到实验的目的.当然实验没有误差也是不可能的,用钢板尺或游标卡尺测量小车的位移会产生测量误差,电磁打点计时器、斜面小车等会产生系统误差.因此,根据仪器来选择实验方法和实验条件是必要的.下面仅就斜面小车的系统误差做些讨论. In high school physics teaching, there are several experiments carried out with inclined trolleys. Among them, “Verification of Newton’s second law” is a quantitative experiment. If the error is too large, the purpose of the experiment cannot be achieved. Of course, the experiment is impossible without errors. The use of steel ruler or vernier caliper to measure the displacement of the car will produce measurement errors. Electromagnetic strike timers, bevel cars, etc. will produce systematic errors. Therefore, it is necessary to select experimental methods and experimental conditions according to the instrument. The following is only for the inclined cart. Systematic errors are discussed.