完全弹性碰撞是一类特殊的碰撞,它妙趣横生、耐人寻味.本文拟从七个方面入手,通过一些经典的示例和身边的现象,仔细“品味”完全弹性碰撞.如果主碰球的质量为 m_1,被碰球的质量为 m_2,根据动量守恒和机械能守恒,有 Fully elastic collision is a special type of collision. It is fun and intriguing. This article intends to start from seven aspects, through some classic examples and the phenomenon around, carefully “taste” full elastic collision. If the quality of the main touch ball is M_1, the mass of the bumped ball is m_2. According to conservation of momentum and conservation of mechanical energy, there is