Option(ii) will not change
Potential energy of an object does not depend upon its speed but rather its depends on height of object of earth’s surface,its mass and , acceleration due to gravity g , which are constant i.e. does not change during motion of a car on a smooth road as We know the Relation for Potential energy of an object of mass m due to earth’s gravity(g is acceleration due to gravity) held at an height h above ground is
P.E. = mgh
i.e. more is the height of body from ground more is the potential energy and less is the height of body from ground less is the potential energy
now here height of car from ground is constant so potential energy is also same or will not change.
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