Based on your experimentation with the left cannon, if you keep the launch angle constant and vary the force, you will typically observe that force is not directly proportional to range. Instead, the relationship is more complex and often follows a quadratic pattern under ideal conditions (like no air resistance).
When the launch angle is fixed, increasing the force generally increases the range—but not in a linear or directly proportional manner. This is because the range of a projectile is influenced by both the initial velocity (which increases with force) and the angle of launch.
The correct conclusion is that force influences the range in a more quadratic manner, meaning as force increases, the range increases, but the relationship is not simply one of direct proportion.
Given the options you provided, the best answer would be:
Force is not proportional to range.
This captures that the relationship is not direct and implies the complexity of the interaction.