斜面下滑滑块机械能守恒问题新解

Mechanical energy conservation of a block sliding down on incline

重新解答了斜面上自由下滑滑块的机械能守恒问题,得出了在地面上和相对于地面做匀速运动的小车上观察,自由下滑滑块的机械能都守恒的新结论.

This study discusses mechanical energy conservation of a block sliding down on incline,which straightforwardly leads to the observation of car at its average speed.No matter what reference framework we take,the earth,the car and the mechanical energy of a block sliding are conserved.