Can anybody help me it says, Model the force that would cause each velocity change.

Answer:
Explanation:
Please try to take a better photo as it is difficult to read.
For the first case, it is a small force to the right as there is a small velocity change.
For the second case, there is no force as there is no change in velocity
For the third case, it is a large (could be medium but photo is too blurry) force to the right as there is a large change in velocity.