The change of state that is occurring is from the liquid state to the solid state.
normal force because it is perpendicular to the surface
The potential energy of a 30N ball on the ground will be zero. With respect to height, h. Potential energy will be calculated like this. P=mgh. So if its on the ground relatively speaking the h=0. Thus inputting into the above formula. P=0.
Answer: Look where the points are.
Explanation:
