Swings work by converting potential energy into kinetic energy, then kinetic energy back into potential energy, over and over again.

秋千的晃动是通过势能与动能的不停转换实现的。势能转换成动能，动能再转换成势能，如此循环。

youdao

Swings work by converting potential energy into kinetic energy, then kinetic energy back into potential energy, over and over again.

秋千的晃动是通过势能与动能的不停转换实现的。势能转换成动能，动能再转换成势能，如此循环。

youdao