1问题的提出实验总是有误差存在的.问题是我们怎样去面对有误差的结果.在“用打点计时器测自由落体加速度”的实验中,因为仪器的限制,实际测得的自由落体加速度值与标准值差别较大,甚至于学生觉得根本就是一个错误的结果.所以有时候实验中的误差是致命的.“用打点计时器测自由落体加速度”的实验中产生误差的原因是什么?因为实验中有摩擦阻力的存在,包括空气阻力和纸带与计时器之间的阻力,它们是产生误差的主 1 PROBLEM PROBLEMS There are always errors in the experiment, and the question is how we face the result of the error. In the experiment of measuring the free-fall acceleration with a strike timer, because of the limitations of the instrument, The free-fall acceleration value is quite different from the standard value, even if the student thinks it is a wrong result at all, so sometimes the error in the experiment is fatal. "The error in the experiment of measuring the free-fall acceleration with a strike timer What are the causes? Because of the presence of frictional resistance in the experiment, including the air resistance and the resistance between the tape and the timer, they are the main cause of error