Abstract: Based on the investigation and on the spot inspection to a traffic accident ,research on the process of collision vehicles with the help of principle of mechanics. The reason, which caused the traffic accident, was understood and the responsibility of the accident was clear.

摘要： 通过在道路交通事故现场的实地勘测和调查 ,对撞车过程进行了事故成因分析 .在对现场模型合理简化的基础上 ,运用力学原理为找出事故发生的原因 ,划分事故责任提供了可靠的科学依据 .

关键词: 交通事故, 能量平衡, 事故成因