什麼東西有勢能

There are many kinds of energy, for example:
1.Heat energy熱能
2.sound energy聲能
3.electrical energy 電能
4.kinetic energy 動能
5.pootential energy勢能
6.Chemical energy 化學能
7.light energy光能

勢能 ,即是pootential energy,
e.g. a football falling from the sky,
a moving swing
a vehicle sliding from a slope,
a waterfall,
everything that is falling.

English !!!!!!!!!!!!