Water falls from the top of a hill to the ground. Why?

Explanation

This is because the top of the hill is a point of higher gravitational potential than the surface of the Earth i.e., `V_("hill") gt V_("ground")` .
The motion of particles can be analyzed more easily using scalars like U(r ) or V(r ) than vector quantities like `vec (F ) or vec(E )` . In modern theories of physics , the concept of potential plays a vital role.