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机械能守恒定律的内容:在只有重力或弹力做功的物体系统内,动能与势能可以互相转化,而总的机械能保持不变,表达式为Ek1+Ep1=Ek2+Ep2.
The content of the law of conservation of mechanical energy: In an object system where only gravity or elastic work is performed, kinetic energy and potential energy can be transformed into each other, and the total mechanical energy remains unchanged, and the expression is Ek1+Ep1=Ek2+Ep2.