C. Your friend is incorrect, at this point, the cannon ball just has potential energy.
Explanation:
Potential energy is the kind of energy that an object has due to its position.
The unit for energy in the International System of Units (SI) is the joule, which has the symbol J.
Potential energy is usually related to forces that act on a body in a way that the total work done by these forces on the body depends only on the initial and final positions of the body in space.
These forces, receive the name of conservative forces and can be represented at every point in space by vectors expressed as gradients of a certain scalar function called potential.
A graph should be labeled as a Figure, not a Table. The title of the figure should include enough detail that the image could "stand-alone" without having to read too much of the paper
