一、机械能守恒定律的理解机械能守恒定律是高中物理的重点难点,随着学习的深入,机械能守恒定律的条件可拓展为:系统内各物体间发生动能、重力势能、弹性势能的相互转移或转化,而没有转化为其他形式的能量时,系统的机械能就守恒.二、机械能守恒定律的表达方式 First, understanding the law of conservation of mechanical energy The law of conservation of mechanical energy is a key high school physics challenge. With the deepening of learning, the condition of conservation of mechanical energy can be extended to include the mutual transfer or conversion of kinetic energy, gravitational potential energy and elastic potential energy among the objects in the system , But not into other forms of energy, the system of mechanical energy conservation. Second, the law of conservation of mechanical energy expression