摘要
本文针对关于狭义相对论中加速度ａ与力ｆ的方向关系的一些讨论［１］，采用更为直观、简单的方法，同样得出了加速度ａ与力ｆ的方向关系的普适结果；并通过典型例子较全面地讨论和描述了加速度ａ和力ｆ的方向和大小的相互关系，揭示了在狭义相对论和经典力学中ａ与ｆ相互关系的不同；并讨论了在ｖ／ｃ→０时它们的一致性，从一个侧面说明了经典力学的局限性。
In this paper, we have presented a general result of direction relation of acceleration a and force f based on those discussed in special relativity theory, described the relationship between direction and strength of the acceleration and force, revealed differences of the relations betwean a and f in special relativity theory and in classical mechanics and interpreted the limitation of classical mechanics.
