1. Data processing: Differential method is a mathematical processing method, which is used to process data at equal intervals. When dealing with physical quantities such as acceleration, differential method can effectively reduce errors and improve the accuracy of results. The difference method can make the data distribution more uniform, thus reducing the error.

2. Improve the utilization rate of data: In the experiment, the difference method can effectively use data and improve the utilization rate of data. If two adjacent data are directly used for calculation, some data will be wasted, and every other difference method can make better use of the data and improve the accuracy and reliability of the experiment.