Respuesta :
a) rock positioned on the edge of a high cliff has potential energy
What is potential energy ?
Potential energy is the energy that depend upon the relative position of various parts of a system .
Since , work done is stored in the form potential energy , it can be concluded that rest objects possess potential energy . If its moving then energy is in the form of kinetic energy
since in all other options ball , bus and food is mobile and only in option a) rock is positioned at rest and is at certain height
so , correct answer is a) rock positioned on the edge of a high cliff
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