Final answer:
When an object is traveling in the positive direction and accelerating in the negative direction, it will slow down.
Step-by-step explanation:
True. When an object is traveling in the positive direction and accelerating in the negative direction, it will slow down. This is because the positive velocity and negative acceleration are in opposite directions, leading to a decrease in speed. For example, if a car is moving forward and its acceleration is backward, it will gradually slow down.