Abstract: According to the mechanical characteristics and principles in this paper, the instantaneous speed determination of car collision in the traffic accident of car collision with electric two-wheeler is studied. Aiming at the different collision forms and angles between car and electric two- wheeler, the formula for calculating car speed at the moment of collision is given based on the principle of mechanical characteristics and the experience of related experiments. The content of this paper provides a more practical speed calculation method for the division of the traffic accident responsibility of the car collision with the electric two-wheel vehicle, in order to solve the problem of collision speed, play a helpful and enlightening role.

Key words: Collision electric two-wheeler; Instantaneous speed; Mechanical characteristics; Momentum conservation

摘要： 文章依据力学特性及原理，对轿车碰撞电动二轮车的交通事故中轿车碰撞瞬间车速确 定进行了研究。针对轿车与电动二轮车的不同碰撞形态和碰撞角度，运用力学特性原理和相 关实验中的经验总结，给出轿车碰撞瞬间的车速计算公式，并且对公式中所涉及的相关参数 进行了分析界定。为轿车碰撞电动二轮车交通事故责任的划分，提供了较为实用的车速计算 方式，以期在解决碰撞车速的问题时起到帮助和启发的作用。

关键词: 碰撞电动二轮车；瞬间速度；力学特性；动量守恒